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{{featured}}
 
{{featured}}
 
{{robotmaster
 
{{robotmaster
|name= [[File:Xsigma.png|left|48px|Σ]][[File:Xsigma.png|right|48px|Σ]]Sigma
+
|name= [[File:MHX SigmaLogo.png|left|40px|Σ]][[File:MHX SigmaLogo.png|right|40px|Σ]]Sigma
|image=[[File:MHXSigma.jpg|270px|Sigma]]
+
|image=[[File:Mega Man X DiVE Hunter Program Sigma.png|370px|Sigma]]
|caption=Sigma in his original form as he appears <br />in [[Mega Man Maverick Hunter X]].
+
|caption=Sigma in his original form as he appears <br />in ''[[Mega Man X DiVE]]''.
|designer=Varies, see individual profiles below.
+
|designer=Varies; see individual profiles below
 
|script = シグマ
 
|script = シグマ
 
|romaji = Shiguma
 
|romaji = Shiguma
|weak=''[[#Mega Man X|See below]]''
 
 
|age=Unknown
 
|age=Unknown
 
|gender = Male
 
|gender = Male
 
|eyecolor = Blue
 
|eyecolor = Blue
 
|haircolor = Bald
 
|haircolor = Bald
|appearances=[[Mega Man X (series)|Mega Man X series]], except [[Mega Man X: Command Mission]].<br/>[[Rockman ×over]]
+
|appearances=[[Mega Man X (series)|''Mega Man X'' series]], except ''[[Mega Man X: Command Mission]]''<br/>''[[Rockman ×over]]''<br/>''[[Project X Zone 2]]''<br/>''[[Marvel vs. Capcom: Infinite]]''
|appear2=[[Mega Man (Ruby-Spears)]]<br />[[Rockman X (manga)]]
+
|appear2=[[Mega Man (Ruby-Spears)|''Mega Man'' (cartoon)]]<br />[[Rockman X (manga)|''Rockman X'' manga]]
  +
|voiceactorjap=[[Makoto Terada]] (1997-present)
|voiceactoreng=Charlie Fontana (X4)<br />Walter Roberts (X7)<br />[[Wikipedia:Dave Pettitt|Dave Pettitt]] (X8)<br>Gerald Matthews (MHX)<br>[[Wikipedia:Jim Byrnes (actor)|Jim Byrnes]] (cartoon)
 
  +
|voiceactoreng=Charlie Fontana (X4)<br />[[Walter Roberts]] (X7)<br />[[Dave Pettitt]] (X8)<br>[[Gerald Matthews]] (MHX)<br>[[Wikipedia:Jim Byrnes (actor)|Jim Byrnes]] (cartoon)<br>Chris Tergliafera (Marvel vs Capcom: Infinite)
|voiceactorjap=[[Wikipedia:Mugihito|Mugihito]] (''1997-present'')
 
  +
|status=Deceased|cause_of_death=Erased by the Mother Elf, as of the ''Mega Man Zero'' series.}}
}}
 
   
  +
{{quote|Wallow in despair and hopelessness! The plan to destroy the world you so love is finally coming to fruition! I shed no tears for you and your kind!|Sigma|Mega Man X8}}
{{quote|Listen well, [[Mega Man X (character)|X]]. There are times when we [[Maverick Hunters]] cannot afford to hesitate in pulling the trigger. We must become both sword and shield to those who cannot protect themselves - that is our sworn duty. Never forget that!|Sigma, as "Commander Sigma"|The Day of Σ}}
 
   
  +
{{Nihongo|'''Sigma'''|シグマ|Shiguma}} is the primary antagonist of the [[Mega Man X (series)|''Mega Man X'' series]]. Once the commander of the [[Maverick Hunters]], Sigma fell into [[Insanity|insanity]] and turned [[Maverick]] himself, becoming the leader of all haywire [[Reploids]] in waging war on [[Human|humanity]]. Although he has been destroyed countless times, Sigma's programming almost always survives and finds a new form, ready to menace the world once again.
{{quote|It's not over yet, X! The battle! The angst! The destruction! I will make you understand the true potential of [[Reploids]]!|Sigma as a [[Maverick]]|Mega Man Maverick Hunter X}}
 
   
  +
He serves as the final boss in all mainline games in the series, except ''[[Mega Man X8]]'' where he is the penultimate boss in Normal and Hard mode.
{{Nihongo|'''Sigma(/Σ)'''|シグマ|Shiguma}}, formerly referred to as "Commander Sigma", is the main antagonist of the [[Mega Man X series]]. He serves as the final boss in all X series games except ''[[Mega Man X: Command Mission]]'' (where he makes no appearances) and ''[[Mega Man X8]]'' (appearing as the final boss if the game is played on easy, and as the penultimate boss if the game is set to normal or hard difficulty, since [[Lumine]] is fought on normal or hard).
 
 
The first Reploid created by [[Dr. Cain]],<ref>'''Mega Man Xtreme Walk-trough (ロックマン X サイバーミッション 完全攻略 ガイド, ''Rokkuman X Saibaa Misshon Kanzen Kouryaku Gaido'')''' According to this guide released by Haoh Magazine ([[Haoh Game Special|Haoh Game Special 185]]), if you exclude X and Zero as Repliroids, Sigma, whom Dr. Cain created, was the first Repliroid.
 
 
'''[[Compendium of Rockman X]]'''<br>
 
Using the data from the blue robot called X as his base, Dr. Cain manufactures Sigma. A robot born with the highest abilities, without comparison from all prior robots. The general term for that robot became known as "repliroid."</ref> Sigma was considered the finest of the Reploids and was the first leader of the Maverick Hunters; peace-keeping Reploids who defend humans against their renegade counterparts. Although he was once honorable, Sigma unexpectedly goes Maverick in the beginning of ''[[Mega Man X (video game)|Mega Man X]]'' and rebels against humankind. He defects to the Mavericks and assumes the role of their leader. Under Sigma's command, the Mavericks grow into a legion dedicated to the extermination of the human race. Sigma instigates many of the destructive Maverick Wars, with the Maverick Hunters existing to crush Sigma and his minions.
 
 
Although he has been destroyed countless times, Sigma's programming always survives and builds himself a new form, ready to menace the world once again.<ref>[http://www.mmhp.net/X/Characters.html Mega Man Homepage - X Characters]. Retrieved on 2006-August 6.</ref> It is implied that he grows more insidious and vengeful with each transformation, with each successive plan becoming more and more desperate and aggressive. His primary enemies are [[Mega Man X (character)|X]], [[Zero]], and more recently, [[Axl]].
 
 
==History==
 
===Before Mega Man X===
 
As the former leader of the Maverick Hunters, Sigma was originally the most advanced Reploid of his time. Dr. Cain implanted the latest circuitry designs into Sigma, which were theoretically supposed to prevent him from going Maverick. He was placed in charge of the 17th Elite Unit of the Maverick Hunters, and led them to victory multiple times.
 
 
[[File:Zero&Sigma.PNG|330px|right|Sigma fighting against Zero.]]
 
One day, the Maverick Hunters received reports of an overwhelmingly powerful "Red Maverick" that has destroyed an entire squadron of Hunters (the Gamma unit). While investigating, Sigma, along with his unit, tracked it down to an abandoned laboratory. Sigma then left to confront it alone, in order to prevent other Reploids' deaths at the hands of the Maverick. It is here that Sigma encountered Zero, the last product of [[Dr. Wily]]. Zero, having suffered a programming flaw from his creation, was uncontrollable, unleashing wanton destruction wherever he went. Sigma was beaten badly by the maddened Zero, but managed to smash the energy crystal in Zero's helmet. The fight, due to taking place in close proximity to Zero's capsule, which was leaking trace amounts of the Maverick Virus, and the damage they already sustained in the battle, transferred the [[Maverick Virus]] directly into Sigma and Zero, infecting them. Zero lost consciousness, and Sigma limped away from the battle, ordering his men to take the body of Zero back for study. The virus had different effects on them: Although the virus corrected the flawed programming in Zero, it began to mutate and adapt to Sigma's own programming, eventually fusing entirely with his mind to form the [[Sigma Virus]], which allowed him to manipulate and control Reploids, bending them to his will. After this, he began to feel that humanity was keeping Reploid potential down, and decided to revolt against humanity.
 
 
===The Day of Σ===
 
{{Main|The Day of Σ}}
 
Sigma appears in a short unlockable OVA in the game ''[[Mega Man Maverick Hunter X]]'' for the PSP entitled "[[The Day of Σ]]". It shows the Maverick Hunters prior to the events of the game under Sigma's command, before he ultimately revolts. It should be noted that the events in this OVA coincide more with the canon of ''Mega Man Maverick Hunter X'' than with that of the original game.
 
 
===Mega Man X/Maverick Hunter X===
 
{{Robotmaster
 
|name = Sigma
 
|image = [[File:Mmxsigma.jpg|270px|Sigma]]
 
|caption = Sigma as he appears in Mega Man X.
 
|hp = '''Mega Man X:'''<br>'''Form 1 (Sigma):'''<br>32<br />'''Form 2 (Wolf):'''<br>32
 
|at = '''Mega Man X:'''<br>'''Form 1 (Sigma):'''<br>10 (contact)<br>14 (beam sword slash)<br>8 (head beams)<br />'''Form 2 (Wolf):'''<br>10 (contact, head)<br>8 (contact, claws)<br>10 (electric orbs)<br>14 (fire breath)<br>12 (claw thunder)
 
|weak = '''Form 1 (Sigma):''' [[Electric Spark]]<br />'''Form 2 (Wolf):''' [[Rolling Shield]]
 
|stage = [[Sigma Palace]] 4
 
|designer = [[Keiji Inafune]]<br/>Tatsuya Yoshikawa (Wolf Sigma)<ref>"I did [[D-Rex|D-REX]] and Wolf Sigma. I designed the hands to be detached and floating for character display reasons on the Super NES. (laughs)" -''Tatsuya Yoshikawa'' <br/>[[R20 Rockman & Rockman X Official Complete Works|Mega Man X Official Complete Works]], [[wikipedia:UDON|UDON Entertainment Corp.]] 2009. pg.17. Retrieved on April 8, 2011.</ref>
 
|appearances = [[Mega Man X (video game)|Mega Man X]]<br />[[Mega Man Maverick Hunter X]]<br />[[Mega Man Xtreme]] (same forms)
 
|appear2 = [[Mega Man (Ruby-Spears)|Mega Man (cartoon)]]
 
|sprite = [[File:Mmx1sigmaform1a.gif|Σ]][[File:Mmx1sigmaform1b.gif|Σ]][[File:Mmx1WolfSigma.gif|200px|Wolf Sigma]]
 
|music = {{Listen
 
|style= font-size: 11px;
 
|header= '''Sigma's boss themes:
 
|filename= MMX-SIGMA 1st.ogg
 
|title= "Sigma 1st"
 
|description= Original [[Mega Man X (video game)|Mega Man X]] theme.
 
|filename2= MMX-SIGMA 2nd.ogg
 
|title2= "Sigma 2nd"
 
|description2= Original [[Mega Man X (video game)|Mega Man X]] theme.
 
|filename3= MHX-sigma battle.ogg
 
|title3= "Sigma Battle"
 
|description3= [[Mega Man Maverick Hunter X|Maverick Hunter X]] version.
 
|filename4= MHX-final sigma battle.ogg
 
|title4= "Final Sigma Battle"
 
|description4= [[Mega Man Maverick Hunter X|Maverick Hunter X]] version.
 
|plain=yes
 
}}
 
}}
 
{{quote|[[Mega Man X (character)|You]] say you believe in justice. But that's not true. You've only been led to think that. Nothing more!|Sigma|Mega Man Maverick Hunter X}}
 
 
Sigma's advanced circuitry seems to do its job, as he seemingly remains stable for months after the lab incident. He gradually succumbs to the virus inside of him and grows more volatile. Without warning, he leads a mass revolt among the Reploids, declaring total war on humanity, which is seen depicted in [[The Day of Σ]].<ref>[http://www.mmhp.net/gamehints/MMX1.html MMHP: Mega Man X]. Retrieved on 2006-6-8.</ref> Many Maverick Hunters follow Sigma out of loyalty, leaving Zero, who by this time was reformed and had become a powerful Maverick Hunter, in charge of the organization. Mega Man X, the last creation of [[Dr. Light]] and the base model for every Reploid, decides to join Zero as thanks for saving his life. X and Zero battle through the Maverick regime, and it is X who finally destroys Sigma, who laments X's decision for siding with humanity, feeling that Reploids would have prospered without humanity holding them back.<ref>'''Sigma:''' Why, X?! Why have you done this to us?! Without the humans, my Reploid brothers could have ushered in a new age.....</ref> But, though his physical body is scrapped, Sigma's "soul" (the Virus) survives. After the end credits roll, Sigma's face appears on a blue monitor and warns X that he will be back.<ref>'''Sigma:''' YOU HAVE WON A TEMPORARY VICTORY, X! WHAT YOU DESTROYED WAS ONLY A TEMPORARY BODY -- MY SPIRIT REMAINS INTACT. IN TIME I WILL FIND BODIES STRONG ENOUGH TO DO MY BIDDING AND I WILL RETURN. I WILL SEE YOU SOON, X. VERY SOON... --''Mega Man X'' game, 1993 (US)</ref>
 
 
*Sigma will first send his pet, [[Velguarder]], to test X's worthiness, before confronting him wielding a beam saber. Sigma's attacks consist mostly of dashing and wall jumping. He also fires lasers from the crystal in his forehead. After defeating his first form, Sigma's head attaches itself to a canine-like, giant body called '''Wolf Sigma'''.<ref>[[R20 Rockman & Rockman X Official Complete Works]], page 125.</ref> This form attacks with claws, electricity, and fire, and can only be damaged by targeting its head. It should also be noted that, in the SNES version, Wolf Sigma is completely immune to the [[Hadouken]].
 
 
*In [[Mega Man X (video game)|Mega Man X]] and its remake [[Mega Man Maverick Hunter X]], it is shown that coupled with his goal to exterminate humanity, Sigma is also obsessed with unleashing X's full potential, believing him to be the future of all Reploids.<ref>'''Sigma:''' Magnificent, X! And to think you've been classified as a "B-class" hunter! Ha ha ha ha!<br />'''X:''' Sigma! Your Maverick plans stop RIGHT HERE!<br />'''Sigma:''' Mwah ha ha! Hah ha ha ha ha ha!</ref> His death is also slightly different. Aside from his lamenting about X's decision for siding with humanity being cut, Sigma also slips and struggles to get back up, eventually inching closer to X (presumably as a last attempt at killing X), only for his wolf body's explosions to worsen and have him fall to his death. Besides his actions in the main game, he also effectively acts as [[Vile]]'s commanding officer in Vile Mode, telling him to challenge his lieutenants. After Vile successfully does so, he also invites Vile over to fight him. However, Vile was unable to get the chance to do so after being (barely) defeated by X and Zero. Sigma also finds Vile's broken body, and questions him in regards to what his motives were in the Maverick Wars. When Vile admitted that even he didn't know, Sigma then leaves him, although not before making sure to radio some of his men with the order to retrieve him.
 
<br clear=all/>
 
 
===Mega Man X2===
 
{{Robotmaster
 
|imagebg = #FFF
 
|name = Neo Sigma
 
|image = [[File:X2 sigma.jpg|250px|Neo Sigma]]
 
|hp = '''Form 1 (Neo Sigma):'''<br>32<br>'''Form 2 (Sigma Virus):'''<br>64
 
|at = '''Form 1 (Neo Sigma):'''<br>2 (contact)<br>2+2 (slash smash)<br>4 (electric orbs)<br>2 (plunge)<br>6 (electric wall)<br>'''Form 2 (Sigma Virus):'''<br>2 (contact)<br>6 (laser beam)<br>4 (enemy orbs)<br>2 per hit (viral wrap)
 
|weak = '''Form 1 (Neo Sigma):'''<br/> [[Sonic Slicer]] <br />'''Form 2 (Sigma Virus):'''<br/> [[Strike Chain]]
 
|stage = Central Computer
 
|designer =
 
|appearances = [[Mega Man X2]]<br />[[Mega Man Xtreme 2]] (first form)
 
|sprite = [[File:X2sigma.gif|Neo Sigma]][[File:MMX2-SigmaVirusGreen.png|Sigma Virus]]
 
|music = {{Listen
 
|style= font-size: 11px;
 
|header= '''Sigma's Mega Man X2 boss themes:
 
|filename= X2-SIGMA 1st.ogg
 
|title= "Sigma 1st"
 
|description=
 
|filename2= X2-SIGMA 2nd.ogg
 
|title2= "Sigma 2nd"
 
|description2=
 
|plain=yes
 
}}
 
}}
 
{{q|Fine. If you will not follow me, then I'll watch [[Zero|you]] die once again!|Sigma}}
 
{{See also|Sigma Virus}}
 
Just as he promised he would, Sigma returns and assumes leadership of his Maverick forces. He gains a new body with the help of the [[X-Hunters]], a trio of vengeful Mavericks who worship him, and becomes '''"Neo Sigma"'''. He also oversees the "Unification" plot, which focuses on capturing and re-assembling the remains of Zero, whom he plans to reprogram to kill Mega Man X. But, since X managed to recover all of Zero's remains from the X-Hunters, Sigma was forced to make a copy of Zero's body that was not unlike Zero's Black Zero form; however, Zero arrives and destroys it completely before it could battle with X. Sigma then announces that he "knows Zero's secret", and that he's destined to serve him. It's unknown what exactly this secret is, but the dialogue suggests that it has something to do with Zero being created by Dr. Wily, and the possible origins of the Maverick Virus as Sigma calls him ''"the last of [[Dr. Wily|the Doctor]]'s creations"''. Sigma attacks in his latest form, armed with clawed knuckles, but X thwarts his plans and destroys him again. This marks the first time Sigma's viral form is seen, as the final boss of the game.<ref>[http://mmxz.zophar.net/megamanxz/megamanx2/bosses.shtml Mega Man Homepage - Mega Man X2: Bosses]. Retrieved on 2007-8-6.</ref> Zero is then restored to his rightful place in the Maverick Hunters, and is given command of his own Special 0 Unit.
 
<br clear=all/>
 
 
===Mega Man Xtreme===
 
{{Robotmaster
 
|name = Sigma
 
|image = [[File:X1CMSigma1.png|center|Sigma]]
 
|caption = Sigma as he appears in Mega Man Xtreme.
 
|hp = '''Form 1 (Sigma):'''<br>32<br />'''Form 2 (Wolf):'''<br>32
 
|at = '''Form 1 (Sigma):'''<br>10 (contact)<br>14 (beam sword slash)<br>8 (head beams)<br />'''Form 2 (Wolf):'''<br>10 (contact, head)<br>8 (contact, claws)<br>14 (fireball)<br>14 (fire breath)<br>12 (claw thunder)<br>10 (electric orbs)<br>12 (falling electric orbs, Extreme only)<br>12 (lightning stream, Extreme only)
 
|weak = '''Form 1 (Sigma):''' [[Electric Spark]] / [[Speed Burner]]<br />'''Form 2 (Wolf):''' [[Rolling Shield]] / [[Spin Wheel]]
 
|stage =
 
|appearances = [[Mega Man Xtreme]]
 
|appear2 =
 
|sprite = [[File:MMXT1-SigmaFinalForm.png]]
 
}}
 
{{q|Bwah ha ha ha. Your efforts are futile... I will never be defeated! As long as Mavericks exist... As long as evil exists in the minds of humans... I'll come back again and again! X, ZERO... I'll pursue you to the end of the world! Bwah ha ha ha! Farewell! FOR NOW!! Bwah ha ha!|Sigma}}
 
 
Sigma uses a hacker named [[Techno]] to hack into the Mother Computer of the Maverick Hunter base. Noticeably more confident than previous times, Sigma taunts X after he's beaten the first time and even calls his defeat at the end of Normal Mode merely a retreat. It's only when he's defeated on Hard Mode that he seems to succumb to X. However, he implies in the ending that he'll return as long as not only mavericks still exist, but also as long as humanity retains evil minds.
 
 
*Sigma has the same forms from the first Mega Man X, complete with the same weaknesses. However, Wolf-Sigma can also be damaged by normal buster shots, and can easily be defeated with rapid-fire turned on.
 
<br clear=all/>
 
 
===Mega Man X3===
 
{{Robotmaster
 
|name = Sigma
 
|image = [[File:Neo 2SigmaX3.jpg|270px|X3 Sigma]]
 
|hp = 32 (Sigma)<br>32 (Kaiser Sigma)
 
|at = '''Sigma:'''<br>8 (contact)<br>8 (fire ball)<br>1 (fire ball, diagonal)<br>8 (boomerang shield)<br>'''Kaiser Sigma:'''<br>8 (contact)<br>8 (homing projectile)<br>14 (missiles)<br>1-32 (wide beam)
 
|weak = '''Form 1:''' <br/>[[Spinning Blade]]/[[Frost Shield]]<br />'''Form 2 (Kaiser Sigma):'''<br/> Charged X-Buster, [[Z-Saber]]
 
|stage = [[Dr. Doppler]]'s Laboratory
 
|designer = [[Keiji Inafune]]<br/> Tatsuya Yoshikawa (Kaiser Sigma) <ref>"They sent Kaiser Sigma around to me towards the end. The only instructions I received were to make him 'messy.' (laughs)" -''Tatsuya Yoshikawa''<br/>[[R20 Rockman & Rockman X Official Complete Works|Mega Man X Official Complete Works]], [[wikipedia:UDON|UDON Entertainment Corp.]] 2009. pg.17.. Retrieved on April 8, 2011.</ref>
 
|appearances = [[Mega Man X3]]
 
|sprite = [[File:KaiserSigma.gif|Sigma first form]][[File:X3Sigmasprite.gif|Kaiser Sigma]]
 
|music = {{Listen
 
|style= font-size: 11px;
 
|header= '''Sigma's Mega Man X3 boss themes:
 
|filename= X3SFC-SIGMA 1st.ogg
 
|title= "Sigma 1st"
 
|description= Super Famicom theme.
 
|filename2= X3SFC-SIGMA 2nd.ogg
 
|title2= "Sigma 2nd"
 
|description2= Super Famicom theme.
 
|filename3= X3Arrange-SIGMA 1st.ogg
 
|title3= "Sigma 1st"
 
|description3= Arranged CD-Rom version.
 
|filename4= X3Arrange-SIGMA 2nd.ogg
 
|title4= "Sigma 2nd"
 
|description4=Arranged CD-Rom version.
 
|plain=yes
 
}}
 
}}
 
{{q|We meet again X... It was easy to corrupt that fool, Doppler. And I would have succeeded if you hadn't interfered. But we are always destined to meet, aren't we X? Let the eternal struggle begin!!|Sigma}}
 
Sigma resumes his threat when he infects the Reploid scientist [[Dr. Doppler]], who has developed a revolutionary new anti-virus to repel Sigma's influence. Sigma uses him to stage a revolt in Doppler Town, a Utopian city established on the principles of peace.<ref>[http://mmxz.zophar.net/megamanxz/megamanx3/characters.shtml Mega Man Homepage - Mega Man X3: Characters]. Retrieved on 2007-8-6.</ref> Once Doppler is unmasked as a pawn, Sigma emerges in a heavily-armored form, {{Nihongo|'''"Kaiser Sigma"'''|カイザーシグマ|Kaizā Shiguma}}.<ref>[http://www.youtube.com/watch?v=RCY8Y-T8usA#at=319 Mega Man X3 ending.]</ref> After his defeat for the third time, Sigma's "soul" appears in the form of a wire-frame head, which is identical to the Sigma Virus', and threatens to possess [[Mega Man X (character)|X's]] body to replace its own. After chasing X through the flaming wreckage of the base, Sigma finally corners him. If Zero did not end up critically wounded at any point during the game, which would have forced him to leave the war to X as he was repaired, Zero appears and utilizes the anti-Virus created by Doppler to erase Sigma for the time being. If Zero did end up critically wounded, including the method by which X receives the Z-Saber, Doppler uses the anti-Virus and sacrifices himself to destroy Sigma's programming.
 
<br clear=all/>
 
 
===Mega Man Xtreme 2===
 
{{Robotmaster
 
|name=Sigma
 
|image=[[File:X2SESigma1.png|Form 1]]
 
|caption = Sigma as he appears in Mega Man Xtreme 2.
 
|hp= '''Form 1:'''<br>32<br>'''Form 2:'''<br>32
 
|at = '''Form 1:'''<br>6 (contact)<br>4 (electric orbs)<br>8 (slash)<br>10 (electric wall)<br>10 (claw drop)<br>'''Form 2:'''<br>8 (contact, machine)<br>8 (contact, Sigma)<br>2 (energy orb)<br>Instant Death (crush, Zero)<br>8 (slow barrier dash, X)<br>8 (fast barrier dash, Zero)<br>2 (barrier toss, Zero)<br>2 (laser, X)
 
|weak='''Form 1:'''<br/> [[Drill Crush]]/[[Dash]]/[[Marine Tornado]]<br />'''Form 2:'''<br/> [[Tornado Fang]]/[[Z-Saber]]/[[Marine Tornado]]
 
|appearances=[[Mega Man Xtreme 2]]
 
|sprite = [[File:X2SESigma2.png|Form 2]] [[File:MMXT2-Sigma2X.png|Form 2, X]] [[File:MMXT2-Sigma2Zero.png|Form 2, Zero]]
 
}}
 
{{q|It seems that I underestimated you... The playtime is over... Now I'll bring this to an end...|Sigma}}
 
In [[Mega Man Xtreme 2]], Sigma appears in Extreme Mode after the defeat of the Soul Erasers [[Berkana]] or [[Gareth]] (depending on if the player is X or Zero), where it's revealed he was behind the Erasure incident. In a rare instance, he's pleased that X defeated Berkana, claiming she went too far in her greed.
 
 
*Sigma's first form is the same from Mega Man X2, "Neo Sigma", but his second form is {{Nihongo|'''Sigma Beast'''|シグマビースト|Shiguma Bīsuto}}.<ref>[[Compendium of Rockman X]]</ref> The color of his second form is initially orange, but later alternates between blue and red, which can only be damaged by X while he is blue, and by Zero when red. His weak point is the big lion-like face in his chest.
 
<br clear=all/>
 
 
===Mega Man X4===
 
{{Robotmaster
 
|name = Sigma
 
|image = [[File:X4Sigma.jpg|270px|X4 Sigma]]
 
|hp = 48 (for each form)
 
|at = '''Form 1:'''<br>4 (contact)<br>6 (energy ball)<br>9 (scythe dash)<br>'''Form 2:'''<br>4 (contact)<br>9 (contact, scythe)<br>9 (scythe spin)<br>6 (scythe discharge)<br>6 (shoulder blade)<br>9 (eye laser beams)<br>'''Form 3:''' (alternates between two forms)<br />'''Form 3A: (Cyborg):'''<br>9 (contact)<br>9 (laser ray)<br>9 (laser beam)<br>'''Form 3B: (Slime):'''<br>9 (contact)<br>9 (chomp)<br>6 (shrapnel)<br>24 (spike wall)<br>'''Mini Bodies:'''<br>9 (head spikes)<br>6 (red head flames)<br>9 (blue head ice mist)<br>6 (yellow head electric ball)
 
|weak = '''Form 1:'''<br/> [[Rising Fire]] (X)<br/>[[Ryuenjin]] (Zero)<br />'''Form 2:'''<br/> [[Lightning Web]] (X)<br/>[[Rakuhouha]] (Zero)<br />'''Form 3:''' (alternates between two forms)<br />'''Form 3A: (Cyborg):'''<br/> [[Soul Body]] (X)<br/>[[Ryuenjin]] (Zero)<br/>'''Form 3B: (Slime):'''<br/> [[Ground Hunter]] (X)<br/> [[Shippuuga]]/[[Hyouretsuzan]] (Zero)<br/>'''Mini Bodies:'''<br/>[[X's weaponry|X-Buster]] (Charged w/ [[X's armors#Force Armor|Arm Parts]]) (X)<br/>[[Ryuenjin]] (Zero)
 
|stage = Final Weapon
 
|designer = Haruki Suetsugu
 
|appearances = [[Mega Man X4]]
 
|sprite = [[File:Reaper sigma.gif|Form 1]]<span style="padding-left:20px">[[File:Mmx4ReaperSigma2.gif|Form 2]][[File:MMX4AlienCannonSigma.gif|Cyborg Body]][[File:Mmx4DisfiguredHeadSigma.png|Slime Body]]<br/>[[File:Mmx4SigmaHeads.gif|Mini Bodies]]
 
|music = {{Listen
 
|style= font-size: 11px;
 
|header='''Sigma's Mega Man X4 boss themes:
 
|filename=X4-SIGMA_1st.ogg
 
|title="Sigma 1st"
 
|description=
 
|filename2=X4-SIGMA_2nd.ogg
 
|title2="Sigma 2nd"
 
|description2=
 
|plain=yes
 
}}
 
}}
 
{{q|Repliforce are the fools this time! Now, all that's left is to destroy Earth with the very weapon they made!|Sigma}}
 
Sigma was thought to be suppressed forever after Zero distributed the anti-virus created by Doppler, but he still manages to return. In the introduction of the game, Sigma, assuming a [[Wikipedia:Death (personification)|Grim Reaper]]-like appearance, acts as a double-agent between the Mavericks and [[Repliforce]], a benevolent squadron of Reploids who assist the Maverick Hunters. Sigma's true motive is to conspire against Repliforce and turn it into a rogue enemy.<ref>'''Sigma:''' Hee hee hee. My plan to keep Repliforce and the Maverick Hunters at each others' throats worked perfectly! --''Mega Man X4'' 1997 (US)</ref> He stages the bombing of the airborne metropolis Sky Lagoon, which plummets to the ground in the opening of the game.
 
 
With in-fighting between the Hunters and Repliforce threatening to destroy them both, Sigma increases his influence over the paranoid [[General]] of Repliforce. The General, an outspoken advocate of Reploid independence, loses all faith in peace and prepares a satellite laser attack on all humans, which is Sigma's real intention.<ref>'''General:''' ...We're going to build a nation for the Reploids. That's our ultimate goal. We'll fight anyone who tries to interfere with our independence. --''Mega Man X4'' 1997 (US)</ref> Fortunately, Mega Man X storms the space weapon and stops the General before he can turn its sights on Earth. In the end, Sigma is revealed as the true mastermind and battles X himself, armed with a new body and a scythe. Despite his defeat at X's hands, he succeeds in part by destroying Repliforce.<ref>[http://mmxz.zophar.net/megamanxz/megamanx4/characters.shtml Mega Man Homepage - Mega Man X4: Characters]. Retrieved on 2007-8-6.</ref> In order to ensure both sides of the war were manipulated, he also had one of his agents, [[Double]], infiltrate the ranks of the Maverick Hunters, and also seduced [[Magma Dragoon]] with the concept of power and a chance to fight X/Zero in exchange for instigating the war. He also had [[Cyber Peacock]] and [[Split Mushroom]] fight against X/Zero to test their power and capabilities. Eventually, he had Double fight X when he infiltrated the Final Weapon, and also ordered him to kill some members of the 17th Unit of the Maverick Hunters as their presence risked compromising Sigma's plans.<ref>Mega Man X4<br />''(Something beeps from within Double, and he presses on a panel on his chest. A mysterious voice is then heard.)'' // '''Mysterious Voice (Sigma):''' It's me! Those hunters must not be allowed in here! Terminate them!! // '''Double:''' Roger... (turns back to the Hunters)</ref>
 
 
*If the game is played with Zero, Sigma reveals a portion of Zero's past involving their first encounter that possibly made Sigma a Maverick.
 
 
*Interestingly, this is the only game where all of Sigma's audio pre-battle quotes are threats (''"Tremble with terror! YOU ARE FINISHED!"'', ''"Prepare to become space dust!"'', ''"Are you ready for your final journey?!"'' or ''"Are you ready for round two!?"'', the last of which is uttered during the transition between the first round and the second round). Also, despite being the final boss, his attack patterns in this game are simpler than some of the other bosses.
 
 
*Sigma's reasons for General and Repliforce to rebel is that humanity and the Maverick Hunters seem to want to destroy anything that isn't fully compliant; this foreshadows [[Dr. Weil]]'s conception, as the latter gives a similar description of humanity.<ref>'''Sigma:''' It's about the Maverick Hunters, General. They are far too eager to please the humans and hunt down the Reploids! Do you believe they pose a significant threat?! <br />'''General:''' Perhaps... <br />'''Sigma:''' You already know the truth, General! Their sole mission has been to destroy any Reploids who fail to do as the humans order! -Mega Man X4</ref><ref>'''Dr. Weil:''' Hehehehe... How pitiful. Of course, a Reploid like you would never understand. The joy of ruling all that you see... Only a human could possibly understand!
 
'''Zero:''' A...human?<br/>
 
'''Dr. Weil:''' That's right! I'm a bona fide human. The creator of Reploids... A human being!<br/>
 
'''Zero:''' ...<br/>
 
'''Dr. Weil:''' The desire for power. The joy of making everything work for you. You have no way of experiencing this without a human brain. It's the ultimate joy! No mere Reploid could ever understand! -Mega Man Zero 3</ref>
 
 
*Sigma's grim reaper form is the only time in any X series game were the player cannot progress without using a special weapon; it can only be damaged by X's [[Rising Fire]] or Zero's [[Ryuenjin]].
 
 
<br style="clear:both;"/>
 
 
===Mega Man X5===
 
{{robotmaster
 
|name = Sigma
 
|image = [[File:X5Sigma.jpg|270px|X5 Sigma]]
 
|hp ='''Form 1:'''<br>64-96<br>'''Form 2:'''<br/>96-127
 
|at ='''Form 1:'''<br>9:12:15 (contact)<br>9:12:15 (dash)<br>7:10:12 (blue energy ball)<br>15:20:25 (blue energy wave)<br>6:8:10 (Sigma Virus shield)<br>'''Form 2:'''<br/>6:8:10 (electric ball)<br>15:20:25 (purple cube, materialize)<br>15:20:25 (purple cube, contact)<br>''Fists:''<br>6:8:10 (contact, spikes)<br>8:8:10 (hand crush)<br>6:8:10 (energy shot)<br>14:16:18 (double hand crush)<br>9:12:15 (finger lightning)
 
|weak = '''Form 1:'''<br/> [[Tri-Thunder]] (X)<br/>[[E-Blade]] (Zero)<br>'''Form 2:'''<br/> [[Spike Ball]] (X)<br/>[[Twin Dream]] (Zero)
 
|stage = [[Rei Space|Virus Stages]]/[[Eurasia]] Crash Site
 
|designer = Haruki Suetsugu
 
|appearances = [[Mega Man X5]]
 
|appear2 = [[Rockman X5 (manga)|Rockman X5]]
 
|sprite = [[File:Mmx5FinalSigmaW.gif|Sigma Form 1]]<br/>[[File:Mmx5GammaΣ.gif|200px|Sigma Form 2]]
 
|music = {{Listen
 
|style= font-size: 11px;
 
|header='''Sigma's Mega Man X5 boss themes:
 
|filename=X5-SIGMA 1st.ogg
 
|title="Sigma 1st"
 
|description=
 
|filename2=X5-SIGMA_2nd.ogg
 
|title2="Sigma 2nd"
 
|description2=
 
|plain=yes
 
}}
 
}}
 
{{q|You'd almost fully evolved to your true self... It's a shame you didn't quite make it, Zero. You had so much potential. Oh well, farewell! Well...it's only you now, X... I will let you live this time. But I won't be so kind next time, and there WILL be a next time! See you soon! You... The strongest Reploid! Bwah ha ha!|Sigma}}
 
{{See also|Sigma Head}}
 
It is some time before Sigma resurfaces again. During his absence, Sigma traced Zero's origins to [[Dr. Wily]], and hatches a plot to unlock Zero's "true" power — the [[Sigma Virus#Zero Virus|Zero Virus]] — inside him. Sigma also adapts his programming to completely overwhelm the anti-virus; the ''Sigma Virus'' quickly begins spreading everywhere, turning peaceful machines and Maverick Hunters alike into violent servants of Sigma. The Maverick leader also enlists the help of a Reploid bounty hunter named [[Dynamo]] to crash the orbiting space colony [[Eurasia]] into the Earth, as well as to hinder the Hunters' plans of stopping the collision.
 
 
Sigma's ultimate goal is to mix his own viral code, which is spread across Earth, with the original Zero Virus, and become all-powerful. Sigma hesitates to kill Zero, intending to make him "remember" who he is and revert to his original, intended programming. He fails in this endeavor, and both X and Zero defeat Sigma's new '''"Final Sigma W"''' body (which has been possibly powered and/or developed by [[Dr. Wily]], although this may just be speculation). The speculation comes from this quotes of Sigma after the player defeats Sigma's 1st form and before the battle with the '''"Final Sigma W"''':
 
 
When playing as X:
 
 
''"Here I am. You can challenge me at anytime. I have delightful news. I've recently acquired a new partner. He has been very supportive. He seems to have created quite a few robots. And he gave me the toughest body that you will ever see. You got here sooner than I expected, so it is not yet complete... But...it is enough to defeat you... He is an excellent partner... I believe you two know each other... In fact, he used to be a comrade of yours. He was very persistent about you... and that makes him very helpful to me. You see X, there is someone other than me...who hates you... Now feel our combined rage and die! ...But not before suffering horribly, hahaha! ...Goodbye, X!"''
 
 
When playing as Zero:
 
 
''"Hee hee hee hee. Calm down... I'm here. Let me tell you about an old man I met... He told me you are the strongest in the universe... Tell me, who is that old man? You should know him. Don't tell me you've never met him in your dreams. He seems very interested in you... as if he was your own father...!"''
 
 
In the aftermath of the battle, Zero's severed torso lies dormant on the floor. X picks Zero up and tries to get him to respond. The remains of Sigma's head lying nearby suddenly become active and fire an energy laser directly at X and Zero, hitting both of them in the chest. As Zero's body falls from X's grasp, he manages to fire one last blast from his Z-Buster and finishes Sigma. X is critically wounded in the battle, both from the battle itself and Sigma's final attack (the force of the laser being so strong that it ripped through his body and destroyed his entire lower half and arms), but he is eventually repaired (the [[Mega Man X5 Script (X's story)#Scene 25: A Noble End|cutscene]] suggesting that it may have been by Dr. Light) and returned to the Hunters.
 
 
===Mega Man X6===
 
{{robotmaster
 
|name = Sigma
 
|image = [[File:X6Sigma.jpg|270px|X6 Sigma]]
 
|hp ='''Form 1:'''<br>48-56<br>'''Form 2:'''<br>127
 
|at ='''Form 1:'''<br>7:10:12 (contact)<br>4:6:7 (electric balls)<br>6:8:10 (energy wall)<br>7:10:12 (energy shot)<br>4:6:7 (energy wave)<br><br>'''Form 2:'''<br>'''Sigma:'''<br>12:16:20 (contact)<br>7:10:12 (mouth beam)<br>7:10:12 (vertical beam)<br>9:12:15 (dark energy ball, small)<br>9:12:15 (dark energy ball, large)<br>'''Sigma drones:'''<br>4:6:7 (contact, skull drones)<br>1:2:2 (projectile shot)<br>4:6:7 (platform spike)
 
|weak ='''Form 1:'''<br>[[Metal Anchor]] (X)<br/>[[Rakukojin]] (Zero)<br/>'''Form 2:'''<br/> [[Ground Dash]]/[[Magma Blade]] (X)<br/>[[Ensuizan]]/[[Sentsuizan]] (Zero)
 
|stage = Gate's Laboratory/???
 
|designer = Haruki Suetsugu <ref>"I was told that Sigma shouldn't be fully restored for this one, so I just went with that. He looks like a mess. (laughs)" -''Haruki Suetsugu''<br/>[[R20 Rockman & Rockman X Official Complete Works|Mega Man X Official Complete Works]], [[wikipedia:UDON|UDON Entertainment Corp.]] 2009. pg.60. Retrieved on April 8, 2011.</ref>
 
|appearances = [[Mega Man X6]]
 
|sprite = [[File:Zomb sigma.gif|Sigma Form 1]]<br/>[[File:Mmx6HellSigma.png|200px|Sigma Form 2]]
 
|music = {{Listen
 
|style= font-size: 11px;
 
|header='''Sigma's Mega Man X6 boss themes:
 
|filename=X6-SIGMA_1st.ogg
 
|title="Sigma 1st"
 
|description=
 
|filename2=X6-SIGMA_2nd.ogg
 
|title2="Sigma 2nd"
 
|description2=
 
|plain=yes
 
}}
 
}}
 
{{q|Bha ha ha ha! Not Yet! THE BADDLE HAZ JUSD BEGUNN! DIE! XXX! JUSDIE, X!|Sigma}}
 
Three weeks pass as the human population moves underground to survive the devastation and pollution left by Sigma's last attack. Sigma himself is quickly resurrected by a renegade Reploid scientist, [[Gate]], who was angry at the scientific community for rejecting his advanced Reploid designs. Gate becomes a Maverick after coming into contact with the Zero's DNA in the Eurasia remains, a piece of rubble that contains signatures of the Zero Virus. He then uncovers Sigma's remains, and proceeds to rebuild him. However, due to the stress of spreading the Sigma Virus during ''Mega Man X5's'' "Colony Incident", Sigma's programming is damaged beyond what Gate can repair, and he is reduced to a half-conscious and barely-functioning wreck of his former self. Gate's work on Sigma's new body is unfinished by the time X or Zero confronts him at the end of the game. Although it seems as though Gate rebuilt Sigma merely as a backup plan to further his own goals, Sigma is quick to finish him off after X or Zero finally defeat Gate in battle, stating: ''"Oh please, I did not die, nor did I need your help. Now get lost!"''. Along with his final lines before being destroyed, this is the only instance in [[Mega Man X6]] in which Sigma speaks coherently. He seems to remember little more than his rage toward X and Zero and speaks in a garbled voice.
 
 
*While the player only fights this "reborn" form of Sigma in Mega Man X6, a similar-looking one appears in the ending cinematic for [[Mega Man X7]], as well as various cutscenes with Sigma and [[Red]] (this implies that Sigma may have been stuck in a worn down version of his body thanks to Gate).
 
<br style="clear:both;"/>
 
 
===Mega Man X7===
 
{{Robotmaster
 
|name = The Professor/Sigma
 
|image = [[File:SigmaBustMMX7.jpg|270px|Sigma/The Professor]]
 
|caption = Head shot of Sigma's first form.
 
|hp ='''Form 1:'''<br>160-192<br>'''Form 2:'''<br/>198-256
 
|at ='''Form 1:'''<br>6:12 (contact)<br>8:16 (Bound Shot)<br>8:16 (Double Shot)<br>16:32 (Cannon Laser)<br>'''Form 2:'''<br/>16:16 (contact)<br>16:16 (Laser Bolt)<br>6:6 (Spark Seek)<br>16:16 (Giga Fist)<br>12:12 (Flame Blast)<br>12:12 (Tornado Fire)
 
|weak = '''Form 1:''' <br/>[[Wind Cutter]] (X, Axl)<br />[[Souenbu]] (Zero)<br />'''Form 2:'''<br/> [[Splash Laser]]/[[Explosion]]/[[Gaea Shield]] (X)<br />[[Hadangeki]]/[[Suiretsusen]]/[[Gokumonken]] (Zero)<br />[[Splash Laser]]/[[Explosion]]/[[Gaea Shield]](Axl)
 
|stage = Crimson Palace
 
|appearances = [[Mega Man X7]]
 
|sprite = [[File:Professor.png|150px|Sigma/The Professor]][[File:Colossus.jpg|200px|Sigma Final]]
 
|music = {{Listen
 
|style= font-size: 11px;
 
|header=
 
|filename=X7-Fate_-_Theme_Of_Sigma.ogg
 
|title="Fate~Theme Of Sigma"
 
|description=
 
|filename2=X7-Our_Blood_Boils_-_vs_Sigma_1st.ogg
 
|title2="Our Blood Boils~vs Sigma 1st"
 
|description2=
 
|filename3=X7-Conclusion_-_vs_Sigma_Final.ogg
 
|title3="Conclusion~vs Sigma Final"
 
|description3=
 
|plain=yes
 
}}
 
}}
 
{{q|That's right, folks! I'll do it again, and AGAIN! I will make X AND Zero MINE! Now, come and get me! Give me a good fight, like you always do!|Sigma}}
 
Sigma reappears yet again, under the alias of "The Professor", to manipulate the Maverick hunting organization known as [[Red Alert]]. His plan was to use a mysterious young Reploid named [[Axl]] to copy the D.N.A. signatures of X and Zero and implant them into destructive war machines. The plan fails when Axl flees Red Alert and seeks asylum with the [[Maverick Hunter]]s.
 
 
This prompts Sigma to find a way to bring Axl back into the Red Alert group. He secretly infected the eight Red Alert generals, blackmailing Red into following his orders and causing Maverick uprisings to draw in the Hunters' attention so that they could infiltrate the Crimson Palace. There, the Hunters confront [[Red]], and upon being defeated he regrets being used by "The Professor" and sets part of the building to self-destruct, seemingly killing himself in the process.
 
 
Afterwards, the Hunters confronted Sigma, and once defeated, a reborn Sigma (who appears similar to his first form in Mega Man X6) punches Axl through a wall before vowing to X and Zero to again return in a new body.
 
 
Red, who had been defeated earlier and presumably killed, reappears, and Sigma attempts to possess him. Red is then revealed to be Axl taking on Red's form, who then proceeds to blast Sigma out of a window.
 
 
Unusually for most games in the X series, Sigma is not actually identified by name, even when he reveals himself.
 
<br clear=all/>
 
 
===Mega Man X8===
 
{{Robotmaster
 
|name = Sigma
 
|image = [[File:X8Sigma.jpg|270px|Final Sigma in Mega Man X8]]
 
|caption = Sigma's final form in Mega Man X8.
 
|weak = '''Copy Sigma (in Gateway):'''<br />[[Shadow Runner]] (X)<br />[[Rasetsusen]] (Zero)<br />[[Black Arrow]] (Axl)<br />'''Real Sigma (in Sigma Palace):'''<br />[[Shining Ray]] (X)<br />[[Tenshouha]] (Zero)<br />[[Ray Gun]] (Axl)
 
|stage = [[Sigma Palace]] (Moon)
 
|designer = Tatsuya Yoshikawa <ref>"I followed up on the plain yet powerful image of Sigma from 'X1.' The one thing that I did put a lot of thought into was his chin. Up until now, Sigma's chin was shaped differently, depending on who drew him. I basically took this opportunity to decide once and for all what his chin should officially look like! (laughs) His final form is based on a demon, in contrast to [[Lumine]]'s angel look." -''Tatsuya Yoshikawa''<br/>[[R20 Rockman & Rockman X Official Complete Works|Mega Man X Official Complete Works]], [[wikipedia:UDON|UDON Entertainment Corp.]] 2009. pg.74. Retrieved on April 8, 2011.</ref>
 
|appearances = [[Mega Man X8]]
 
|music = {{Listen
 
|style= font-size: 11px;
 
|plain=yes
 
|header=
 
|filename=X8-Vs_Copysigma.ogg
 
|title="VS CopySigma"
 
|description=Copy Sigma encounter.
 
|filename2=X8-Vs_Sigma_Demo.ogg
 
|title2="VS Sigma Demo"
 
|description2=Confronting the real Sigma.
 
|filename3=X8-Vs_Sigma.ogg
 
|title3="VS Sigma"
 
|description3=Final Sigma battle.
 
}}
 
}}
 
{{q|[[Mega Man X (character)|Your]] dedication to what you refer to as "justice" is what first got me thinking... I realized the imperfection of this world, and decided I must change it.|Sigma}}
 
Sigma's next plot was very complex, and it wasn't even him behind the entire scheme. It turned out that Axl was a prototype for a [[Reploids#New Generation Reploids|new generation of Reploids]]. These next generation Reploids possessed advanced copy abilities, and [[Alia]] discovered that the copy chips bore copies of Sigma's program among other powerful Reploids. Sigma instigated a new Maverick revolt with these new Reploids as the humans were evacuating Earth in hopes of finding a new home on the Moon. However, the revolt was stopped, Sigma was completely devastated, and the real mastermind, [[Lumine]], the manager of the [[Jakob Orbital Elevator|Jakob]] Project, was revealed and beaten. Before his death, Lumine made a startling claim: according to Lumine, Sigma was destroyed for good and not returning.
 
 
It is believed that the reason Sigma would not regenerate within another body after his final defeat is that he was on the Moon, where due to the lack of available bodies to possess, the virus might have weakened in the vastness of space and got completely deleted (although he was also defeated in space in ''[[Mega Man X4]]'', however, that time it was on a large satellite; and the fact that Sigma didn't seem frustrated about this defeat implying that he could escape). There was also a lack of spare bodies, and his last body was hardly finished. However, his DNA is included in every copy chip of all the next generation Reploids so, technically, all New Generation Reploids are "infected" with the Sigma Virus, and possibly Lumine as well; meaning Sigma may return one day.
 
 
Although Sigma himself was destroyed for good, the Sigma virus still lived on, and would plague the world until the discovery and creation of the [[Dark Elf|Mother Elf]] from enzymes in [[Zero]]'s body, due to Zero being the original carrier of the Maverick Virus, which was then neutralized and brought about a permanent end to the Maverick Wars. Unfortunately, the discovery would also result in the start of the far more destructive [[Elf Wars]] due to [[Dr. Weil]]'s radical agenda to punish the Reploids for the damages they caused during the Maverick Wars.
 
{{clear}}
 
 
===Other games===
 
*In ''[[Rockman Xover]]'', Sigma, along with [[Dr. Wily]] and other villains from other Mega Man series, join forces to wreak havoc. He is the boss from World 2 and appears in [[Battle Memory]].
 
*Sigma appears in ''[[Street Fighter x All Capcom]]''.
 
*Sigma, with his appearance from ''Mega Man X4'', is one of Chuck Greene's costumes in the ''[[Dead Rising|Dead Rising 3]]'' DLC mode "Super Ultra Dead Rising 3 Arcade Remix Hyper Edition EX Plus α". He attacks with his scythe and laser eye, and has a special attack called "Sigma Crusher".
 
*Sigma is slated to appear in ''Project X Zone 2: Brave New World'', the sequel to the first game, where he was only mentioned in name.
 
   
 
==Appearance==
 
==Appearance==
 
<!-- Let's avoid describing in words what is obvious from the images in the page -->
 
<!-- Let's avoid describing in words what is obvious from the images in the page -->
Although Sigma has taken many drastically diverse forms throughout the X series, his humanoid design remains fairly consistent, resembling a giant bald human with a cleft chin.
+
Although Sigma has taken many diverse forms throughout the series, his designs maintain several consistent traits. He possesses a bald human head with a gem in his forehead and a cleft chin. His eyes are light blue or white, possessing no irises or pupils, and with a scar torn over each eye (sometimes the scars are merely cosmetic, such as in ''Mega Man X8'' where they are lines running down his entire face). His tall and bulky frame resembles a muscular human body, and his color scheme always includes green and/or purple.
 
Sigma's face also features a pair of scar-like marks run down both eyes, resembling a snake bite. How he got these scars vary: either from his first scuffle with a Maverick Zero, depicted in an animated flashback in Mega Man X4, where he was severely damaged, as shown in The Day of Σ, where X in a fit of rage, burned the scars into Sigma's face with his bare hand, or in the manga version of the story where he burned the scars into his face with his own hands as a sign of rebellion.
 
   
 
==Personality==
 
==Personality==
  +
[[File:X4 SigmaGood (stitched).png|thumb|Sigma as commander of the Maverick Hunters.]]
Sigma was originally an honorable and selfless leader of the Maverick Hunters, but after his corruption, he became a power-hungry tyrant, although even then, he also genuinely believed that he was doing what was in the best interests of the Reploids. He typically looks down on others and does not hesitate to kill the weak, laughing maniacally at their expense. His previous "protection through aggression" philosophy has mutated following his infection into a huge Darwinism complex, believing that anything that is too weak to progress should be annihilated, a la natural selection. Following his defeat, his further descent into madness transcended death, trying to hold onto any grip in the living world, in any form possible, consumed by the lingering thought of killing X. Amidst his madness, Sigma is a calculating and intelligent individual, and on more than one occasion, turned allies of X and Zero against them, and instigated many of the most destructive events of the Maverick Wars, including the [[Mega Man X5|Earth Crisis]]. Sigma is obsessed with Reploid evolution and superiority, and believes humanity has run its course. Despite his hatred for X and Zero, Sigma once believed they were the future of all Reploids, and would lead them all into a new age. In addition, he also credited X's dedication to justice, as well as his being infected with Zero's virus, as being his primary motivation in his going Maverick, including what ultimately turned out to be his final battle on the Moon.
 
  +
Sigma was once the honorable commander of the Maverick Hunters. He was an intelligent leader who easily held the respect of his subordinates. He had a tinge of arrogance, but was ultimately a noble warrior who dutifully protected the humans and his fellow Reploids. However, after being infected by the [[Maverick Virus]], Sigma's flaws were amplified and his moral inhibitions were undone, starting him on the path to become the most infamous Maverick of all time.
   
  +
Sigma gained an extreme pro-Reploid and anti-human prejudice. He believed that humans only held back the development and evolution of Reploids, and the world would be better off without them.<ref name=":0" /> He exhibited traits of savior complex, genuinely believing his crimes were in the best interests of Reploids and that the ends would justify his violent means. His "protection through aggression" philosophy mutated into a Darwinism complex, believing that anything too weak to progress should be eliminated. He did not hesitate to cause global destruction and catastrophe for his goals. He would laugh maniacally and torment his opponents as much as possible. With his electronic brain adapting to the [[Sigma Virus]], Sigma even gained disregard for his own body, acting self-destructively as he could reliably survive any defeat through the virus.
==Abilities==
 
As the former leader of the Maverick Hunters, Sigma is a capable military leader, described as possessing overwhelming combat power and strategic intelligence. When he turned Maverick, Sigma remains a charismatic leader, and is revived on many occasions by Reploid and Maverick admirers alike. Due to the [[Maverick Virus|virus]] in his circuits, he can survive seemingly anything and always return for more. He is a very powerful Reploid, and is fond of incorporating himself into battle suits which are vastly larger and more powerful than his "regular" form. Sigma is also a skilled manipulator, managing to turn various Reploids, Maverick Hunters, and Mavericks to his side. In fact, there were few instances in the entire series where Sigma wasn't pulling the strings. Sigma himself is one of the strongest Reploids ever created, due to his original role as leader of the Maverick Hunters. His personal energy has been stated to be too powerful to even get an accurate reading. In addition, Sigma's combat skills and analytical abilities were extensive enough that he was able to wipe out several reploids in an efficient manner, as Zero noted when investigating the crime scenes on the days leading to Sigma's revolt.
 
   
  +
Amidst his madness, Sigma remained a cunning strategist, formulating a variety of plans to conquer the world. He was a masterful manipulator, on more than one occasion turning allies of [[X]] and [[Zero]] against them. His charisma made him the perfect leader for Maverick rebellions, disguising his insanity and swaying many Hunters to support his cause even without using the Sigma Virus. Still, even he had some reservations, as he noticeably was disgusted with [[Berkana]] and the lengths she was willing to go to satisfy her megalomania.
Sigma is capable of moving at great speed, often able to move faster than the hero can follow, vanishing from sight. Many of his bodies are also capable of teleportation. Sigma seems to favor saber and beam sword weaponry, often integrating powerful sword combos with his blinding speed or teleportation. On several occasions, he projects energy barriers around himself to block incoming attacks. In nearly every appearance, Sigma is capable of discharging enormous destructive blasts or waves of power capable of covering entire battle areas. Sigma's physical strength is considerable. In his first body, during a conflict with the original Maverick Zero, he was able to effortlessly break through Zero's defenses with a round kick, as well as easily toss Zero through the ceiling with a single hand. He has also demonstrated the ability to scale a skyscraper with a single leap.
 
  +
[[File:X6 Opening XvsSigma.png|thumb|Sigma's condescending animus with X.]]
  +
Over the course of the Maverick Wars, Sigma came to respect the rookie Maverick Hunter, X. He claimed that X's devotion to justice is part of what made him begin seeking to change the world in the first place, and he was utterly fascinated by X's powers and his inability to go Maverick.<ref name=":1" /> He also held an obsession with Zero, due to him being the original holder of the Maverick Virus and formerly a close ally in the Maverick Hunters. [[Axl]], on the other hand, he saw as little more than a tool in his schemes and an outdated prototype for the superior [[New Generation Reploid|new generation Reploids]].
   
  +
As Sigma was continually destroyed and resurrected, his sanity began to degrade. The proud warrior fell into a cackling, remorseless psychopath by the Great Repliforce War, and after being resurrected by [[Gate]] he was borderline senile. He regained his composure to control [[Red Alert]], and he finally gathered the foresight to pass his revolutionary ideas on to the new generation Reploids, apparently aware that he was coming to the end of the line.
Sometime prior to Sigma's first defeat at the hands of Mega Man X, his reploid soul became intermingled with the dangerous Maverick Virus and formed the Sigma Virus. This allowed Sigma's spirit to remain after his body was destroyed, granting him immortality and the ability to return after the destruction of each subsequent body. The Sigma Virus possesses the ability to travel through any material or energy and can manipulate both reploid and organic hosts, even on a planetary scale. Its intangibility allows it to ignore physical assaults and energy attacks, except for those tuned with a Virus Buster to target the Sigma Virus's unique matrix. No solution for the Virus remained ultimately effective during 21XX-22XX, as Sigma demonstrated the ability to adapt to any countermeasure. As the cause of death and suffering for countless innocent lives, Sigma is one of the most dangerous villains in the [[Earth|Classic Mega Man Universe]].
 
   
  +
In the remake ''Maverick Hunter X'', [[Sigma/Maverick Hunter X|Sigma]] has a more philosophical and level-headed presence. While he retained his distaste for humans and his desire to rule, his fascination with X's potential was much more emphasized, hinging his entire rebellion on the fact that X represents the future of Reploids. It was implied that he was incapable of experiencing true empathy, unlike X,<ref>''[[Mega Man Maverick Hunter X]]'', Capcom (2006)<br />''The Day of Σ'' Scene 2 Hunter Base<br />'''Sigma:''' As far as [Mega Man X's] judgement and abilities on the battlefield is concerned, he has shown tremendous promise. However, he tends to hesitate when the situation calls for decisive action. // '''Dr. Cain:''' He worries too much. Course, that is his greatest feature. And the source of his potential. Sigma, you don't have that problem at all.</ref> which is part of why he was obsessed with him. His descent into villainy is explored somewhat in the included OVA, ''[[The Day of Σ]]'', which shows more of his stoic leadership as a Hunter and his calculating manipulation as a Maverick. He also acted as a manipulative mentor to Vile during Vile Mode, curious to see if he held the same potential as X. While transformed into Wolf Sigma he descends into manic ranting about chaos and destruction being the true nature of reploids.
==Other media==
 
===[[Mega Man (Ruby-Spears)|''Mega Man'' (Ruby-Spears)]]===
 
[[File:Cartoonsigma2.jpg|thumb|230px|Sigma in the ''Mega Man'' cartoon show.]]
 
Though not a starring character, Sigma was referred to in the episode [[Episode 26: Mega X|Mega X]] of the ''Mega Man'' cartoon, where X, Vile and [[Spark Mandrill]] go back in time. His profile, shown by X, shows him in his ''X1'' body and mistakenly spells his name as '''Cigma'''. The only line Sigma has is when Vile contacts him near the end of the episode — a short praise: ''"Well done, Vile."''
 
   
  +
==Abilities==
===[[Mega Man (Archie Comics)|''Mega Man'' (Archie Comics)]]===
 
  +
As the former commander of the Maverick Hunters, Sigma is a capable military leader, described as possessing overwhelming combat power and strategic intelligence. His circuitry is the most advanced of its time, which allowed him to maintain a semblance of sanity even while mutating with the Maverick Virus. When he finally gave in and turned Maverick, Sigma remained a charismatic leader. If his wiles are not enough to sway one's mind, he is also able to infect them with the [[Sigma Virus]] to force them into madness and loyalty. Due to his affinity with said virus, Sigma's "spirit" can also survive seemingly any physical damage that would be lethal for other Reploids. It is undetectable by conventional scanners, and can only be sensed by Reploids.<ref>'''Zero:''' ...I'm okay. Just a bit of a bruised ego. Anyway, where is Sigma?!
{{main|Sigma/Archie Comics}}
 
Sigma is the main antagonist from the ''Mega Man X'' era and the [[Worlds Unite]] crossover.
 
   
  +
'''X:''' He took off. Alia is looking for him now, but she can't pick up any readings.
===[[Rockman X (manga)|''Rockman X'']]===
 
Sigma starts a rebellion against humans, beginning by killing a Maverick Hunter, [[Manga characters#Kyle|Kyle]], that was against him, and convincing various Hunters to join him by saying that Reploids are superior to humans and they should no longer take orders from them.
 
   
  +
'''Zero:''' He is a virus... ... he can't be seen or analyzed correctly like other data. You have to feel his evil energy. That's the only way to find him.</ref> Its intangibility also allows it to ignore physical assaults and energy attacks, except for those tuned with a Virus Buster or Dr. Doppler's vaccine. His Sigma Virus was only deleted by the [[Mother Elf]].
When Spark Mandrill was giving up the fight against X with fear and saying he would tell all of Sigma's plans to him, Sigma uses a giant hologram of himself (via a flying mechanism) to kill Spark Mandrill and talks with X. Before the fight against [[Armored Armadillo]], it's shown that Sigma scarred Armadillo's left eye because he didn't follow his orders to defeat X in the forest. After defeating the eight Mavericks, Sigma appears and challenges X to fight him in his fortress. Although the battle is difficult, X manages to defeat Sigma. Sigma than uses a giant body that is too powerful for X, but he manages to destroy him by crashing his fortress.
 
   
  +
When not in his viral form, Sigma always has the most physically-advanced and variable Reploid bodies available at the time. He possesses incredible strength and speed, often able to move faster than the Maverick Hunters can follow, and is usually capable of teleportation. In his first body, during a conflict with the Maverick Zero, he was able to effortlessly break through Zero's defenses with a round kick, as well as easily toss him through the ceiling with a single arm. He is also fond of incorporating himself into a variety of battle bodies, each possessing widely different arsenals. He is a capable warrior regardless of whatever weapon he wields, whether it be a beam saber, beam claws, or a shield. In nearly every appearance, Sigma is capable of discharging enormous destructive blasts or waves of power capable of covering entire battle areas, and he is a skilled marksman. As the cause of death and suffering for countless innocent lives, Sigma is one of the most dangerous villains in the [[Earth|classic ''Mega Man'' universe]].
In ''Rockman X2'', Sigma is shown to have survived the event, and starts working on a more powerful body. Still, after the defeat of eight Mavericks and the X-Hunters, Sigma is defeated by X and Zero.
 
   
  +
==History==
In ''Rockman X3'', Sigma took control over Dr. Doppler to start another Maverick uprising, using him to infect several Reploids with "[[Worm]]s" and create a more powerful body by analyzing X and Zero. He has a fierce battle against X, but he is eventually defeated. However, he reveals a more powerful body, Kaizer Sigma, and manages to destroy X. For Sigma's surprise, X regenerates and his [[Third Armor|armor]] became golden, and he uses his new power to destroy Sigma.
 
  +
===Background===
  +
Sigma was created by [[Dr. Cain]] as his magnum opus, considered the most advanced Reploid of his time.<ref>''[[Compendium of Rockman X]]'' page 15</ref><ref>''[[Kodansha Manga Hyakka|Rockman X Chouhyakka]]'' [http://kobun20.interordi.com/2011/07/18/the-sigma-factor/ page 46]</ref> He was put in charge of the [[Maverick Hunters]] after their formation, making Sigma the first Reploid to lead worldwide peacekeeping efforts. He specifically commanded the 17th Elite Unit, leading them to victory many times over the years.[[File:Zero&Sigma.PNG|200x200px|Sigma fighting Zero.|thumb]]
  +
One day, the Maverick Hunters received reports of an overwhelmingly powerful "Red Maverick" that had destroyed an entire [[List of minor characters#Mega Man X4 Maverick Hunters|unit]] of Hunters. Sigma and his unit tracked the Maverick down to an abandoned laboratory; Sigma chose to confront it alone, so as to not endanger his colleagues. It is here that Sigma encountered Zero, the last product of [[Doctor Albert W. Wily|Dr. Wily]]. Zero, having suffered a programming flaw from his creation, was an uncontrollable berserker. Sigma was caught off-guard by Zero's strength and suffered heavy damage. Fortunately, Sigma was saved when a 'W' appeared on Zero's forehead, causing him great pain and allowing Sigma to knock him out by punching his head. In the process, however, the [[Maverick Virus]] lingering in the laboratory was transferred to Sigma, infecting him.<ref>Story summary from [[Rockman Zero Collection Timeline|''Rockman Zero Collection'' official site]]. ([http://www.themmnetwork.com/2010/04/09/does-the-rockman-zero-collection-storyline-explain-everything/ Translation in The Mega Man Network])</ref>
   
  +
Following the battle, Sigma ordered the rest of his unit to retrieve Zero's body and contact Dr. Cain for study, limping away. He was later repaired and reassumed control of the Maverick Hunters as usual. However, the Maverick Virus festered in his mind - while Sigma's highly-advanced circuitry kept him sane for a while, his thoughts became more Maverick over time. The Maverick Virus gradually fused with his mind, mutating into an even more dangerous virus called the [[Sigma Virus]] which he held complete control over. Without moral inhibitions, Sigma considered the role of Reploids in the world; for example, he noticed the father of all Reploids, [[X]], and his dedication to justice, and began wondering how he himself could change the world.<ref name=":1">'''Sigma:''' Your dedication to what you refer to as "justice" is what first got me thinking... I realized the imperfection of this world and decided I must change it. - ''Mega Man X8.''</ref> Eventually, Sigma came to the conclusion that humanity was merely holding Reploids back from achieving their true potential, and secretly began organizing an anti-human rebellion.
Sigma only has a cameo appearance in the ''Rockman X4'' manga, being mentioned by Double in the last chapter.
 
   
===''[[Irregular Hunter Rockman X]]''===
+
===''Mega Man X''===
  +
[[File:Mmxsigma.jpg|thumb|right|270px|Sigma]]
<!--{{Q|かならずやわたしは世界を征服してみせる!!|Sigma}}-->
 
  +
{{Looking for|For more details, see [[Sigma/Mega Man X]].}}
Sigma appears as the leader of the Maverick Hunters. When Storm Eagle challenges X to a fight, Sigma appears and stops Storm Eagle without destroying him, giving him a lecture and the [[Storm Tornado]] to X. However, when Zero starts acting strangely, Sigma tells Armored Armadillo that Zero became a Maverick and orders him to destroy Zero. Later, Vile escapes from his cell and takes four Hunters to work for him. After the defeat of the four Hunters, Sigma orders X to go after Zero and destroy him, but Zero reveals Sigma's involvement in the events and they are attacked by Vile, Storm Eagle, Armored Armadillo, and Boomer Kuwanger. After the defeat of the later three, Vile escapes and Sigma decides to destroy the base of the Maverick Hunters. After talking with [[A-1]], X and Zero go after Sigma, who started attacking the city with several Mechaniloids. Sigma appears to face the two Hunters, but after being hit by two charge shots at the same time, He calls Vile and shows that they took A-1 as hostage, taking advantage over X. Unable to see X taking so many hits, A-1 releases himself and runs to Sigma, self-destructing near him. Sigma is stunned by the explosion, and X, angry and sad for A-1, fires a large charge shot, and Zero also fires one at the same time, but Vile saves Sigma and they escape. While leaving, Sigma tells them that he will surely conquer the world.
 
  +
{{Q|Excellent job, X! I see why Zero counted on you. You are almost as good a Hunter as I was. But, the time of your destruction has arrived! You shall regret ever having defied me!|Sigma}}<!--(
  +
)-->
   
  +
On June 4, 21XX, Sigma finally puts his plans into motion and leads a mass revolt, declaring war on the humans and all Reploids who support them.<ref>"The Journal of Dr. Cain", ''Mega Man X'' instruction manual, 1993. Page 10.</ref><ref>It was originally listed in the Japanese version as July 4th. It was changed to June 4th overseas, most likely because the date fell on the real world American holiday [[wikipedia:Independence Day (United States)|Independence Day]].</ref> Many Maverick Hunters follow Sigma out of loyalty - others, such as [[Storm Eagle]], by force. This leaves Zero, who by this time has reformed and become a powerful Maverick Hunter, in charge of the organization. X agrees to join Zero in the fight, and X and Zero battle through Sigma's Maverick regime together. It is X who finally confronts Sigma alone in [[Sigma's Hideout (Mega Man X)|his fortress]].
==Dialogues from Mega Man X8==
 
===When Encountering Copy Sigma (at Gateway)===
 
<div style="float: left; margin-left:0.5em;" class="tabber">
 
<div class="tabbertab" title="X" style="width:630px; padding:10px;">
 
   
  +
When met with X, Sigma first sends his pet, [[Velguarder]], to test his power. Once it is destroyed, Sigma personally confronts him wielding his beam saber. After his body is destroyed, Sigma's leftover head attaches itself to a giant canine machine called '''"Wolf Sigma"'''.<ref>[[R20 Rockman & Rockman X Official Complete Works]], page 125.</ref> According to the ''Rockman X Saikyou Daizokan'', Wolf Sigma is an incomplete Reploid unto itself, which Sigma then assumes control over.<ref>"A yet incomplete extra large wolf type repliroid. Sigma's head takes over the functions of the brain, but because of its excessive size, the feet and arms require more development time to be completed. Once the super-powered repliroid is completed, Sigma will be unstoppable in his plan for world domination!" - ''Rockman X Saikyou Daikozan''</ref>
'''X:''' Sigma!?
 
   
  +
After Wolf Sigma's defeat, Sigma laments X's decision for siding with humanity, believing that Reploids would have prospered without humanity holding them back.<ref name=":0">'''Sigma:''' Why, X?! Why have you done this to us?! Without the humans, my Reploid brothers could have ushered in a new age.....</ref> He then perishes in an explosion along with the rest of his fortress. Although his physical body is scrapped, Sigma's "soul" (the Sigma Virus) survives. After the end credits roll, Sigma's face appears on a blue monitor and warns X that he will return.<ref>'''Sigma:''' "YOU HAVE WON A TEMPORARY VICTORY, X! WHAT YOU DESTROYED WAS ONLY A TEMPORARY BODY -- MY SPIRIT REMAINS INTACT. IN TIME I WILL FIND BODIES STRONG ENOUGH TO DO MY BIDDING AND I WILL RETURN. I WILL SEE YOU SOON, X. VERY SOON..." --''Mega Man X'' game, 1993 (US)</ref><ref>「おまえがたおしたものは、わたし じしんではない。バラバラになったキカイは、わたしの ぶんしんのようなもの。わたしはふたたび、じったいとなってよみがえる・・・ エックスよ、また あえるひをたのしみに しているぞ。ハハハハハ・・・」
'''Copy Sigma:''' I shall allow you to call me by that name, for I am indeed Sigma.
 
   
  +
Translation: "What you've destroyed, is not my true self<!--/ real body-->. The scattered machine, is something like my avatar. I will become substantial once again... X, I am looking forward to seeing again. Ha ha ha ha ha ..."
'''X:''' You plan to take revenge on every Reploid... Every human... In the entire world? You're completely mad! I'm putting a stop to this right now!
 
   
  +
--''Rockman X'' game, 1993 (Japan)</ref>
'''Copy Sigma:''' Put a stop to what? We already control the moon. That old world has decayed and rotted. I will usher in a new world to replace it! But, before that, X, perhaps it's time for our final showdown!
 
</div>
 
<div class="tabbertab" title="Zero" style="width:630px; padding:10px;">
 
   
  +
==== ''[[Mega Man Maverick Hunter X]]'' ====
'''Zero:''' Sigma!? Can't say I was looking forward to seeing you again.
 
  +
{{Main|Sigma/Maverick Hunter X}}
  +
Sigma's role in the remake ''[[Mega Man Maverick Hunter X]]'' is relatively unchanged. He is vocal about his desire to unleash [[X/Maverick Hunter X|X]]'s full potential, believing him to be the future of all Reploids rather than an obstacle.<ref>'''Sigma:''' Magnificent, X! And to think you've been classified as a "B-class" hunter! Ha ha ha ha!<br />'''X:''' Sigma! Your Maverick plans stop RIGHT HERE!<br />'''Sigma:''' Mwah ha ha! Hah ha ha ha ha ha!</ref> His final battle also has some differences: his head willingly detaches from his body to enter Wolf Sigma, he has no lines during his death nor in the credits, and he falls into the tower below during his death animation. Besides the main game, Sigma also featured heavily in the OVA ''[[The Day of Σ]]''.
   
  +
In Vile Mode, Sigma has already started his rebellion and intends to use [[Vile/Maverick Hunter X|Vile]] as a tool to force X to evolve. Rather than follow Sigma's plans, Vile eliminates the commander's lieutenants, and challenges Sigma. Intrigued by Vile's claim to be the true key to Reploid evolution, Sigma invites Vile to try and reach him with the same methods. However, Vile is unable to get the chance to fight Sigma as he was defeated by X and [[Zero/Maverick Hunter X|Zero]]. Sigma finds Vile's broken body afterwards, and questions him in regards to what his motives were; if he would stand as an enemy or kneel and serve. When Vile admits that he isn't sure himself, an unimpressed Sigma orders his men to extract Vile before departing.
'''Copy Sigma:''' Zero. What a shame... You had the abilities and potential to become like me.
 
  +
{{clear}}
   
  +
===''Mega Man X2''===
'''Zero:''' You... you tried to use my DNA. I'll teach you what happens when you mess with me!
 
  +
[[File:MMX2 Neo Sigma.png|thumb|right|250px|Neo Sigma in ''Mega Man X2'']]
  +
{{Looking for|For more details, see [[Sigma/Mega Man X2]].}}
  +
{{See also|Sigma Virus}}
  +
{{Q|Fine. If you will not follow me, then I'll watch [[Zero|you]] die once again!|Sigma}}<!--(
  +
)-->
  +
Just as he promised, Sigma secretly returns and reassumes leadership of his Maverick forces thanks to the intervention of the fanatical [[X-Hunters]]. He gains a new body with the help of [[Serges]] specifically, becoming '''"Neo Sigma"'''. He also oversees the "Unification" plot, which focuses on capturing and re-assembling the remains of Zero, whom he plans to reprogram as a loyal killing machine.
   
  +
After [[Agile]]'s defeat, he cries out for Sigma to avenge him. X then completes the Maverick [[Boss Rush|rematches]], prompting Sigma's disembodied voice to challenge him. Sigma finally reveals himself in the [[Central Computer Stage]], alongside Zero. If X successfully collected all of Zero's parts from the X-Hunters, it will be a [[Fake Zero]] whom the real Zero easily defeats for him. If not, X will be forced to fight his friend and incapacitate him, bringing him back to his senses. Afterwards, Sigma announces that he "knows Zero's secret", and that he's destined to serve him. He then flees to the depths of the Central Computer, and Zero opens the way for X to follow him for the final battle.
'''Copy Sigma:''' I'm afraid not. The moon is under my control and the plan is entering its final stage. The moment of the world's unraveling is upon us!
 
</div>
 
<div class="tabbertab" title="Axl" style="width:630px; padding:10px;">
 
   
  +
Neo Sigma battles X with arm-mounted claws and electricity attacks similar to [[Electric Spark]], which he claims in the Japanese version were upgrades. After this first body is destroyed, he assumes his true form, that of the Sigma Virus; this marks the first time Sigma's viral form is seen, as the final boss of the game.<ref>[http://mmxz.zophar.net/megamanxz/megamanx2/bosses.shtml Mega Man Homepage - Mega Man X2: Bosses]. Retrieved on 2007-8-6.</ref> X defeats the Sigma Virus, causing him to apparently disappear as the Central Computer explodes. Before he disappears, he taunts X that he will return again and cryptically refers to Zero as "the last of the [[Doctor Albert W. Wily|Doctor]]'s creations."
'''Axl:''' Sigma!? Did you think you could keep us away by running and hiding in space like a coward?
 
   
  +
While Neo Sigma is depicted wearing a cape in official art and the opening of the PSX/Saturn version of ''Mega Man X3'', he is never seen wearing it in his in-game sprites.
'''Copy Sigma:''' Run? Hide? You're mistaken. We merely chose to leave that ignorant planet behind.
 
   
  +
{{clear}}
'''Axl:''' Whatever you say. Either way, I'm gonna toast you right now!
 
  +
===''Mega Man Xtreme''===
  +
{{Q|Bwah ha ha ha. Your efforts are futile... I will never be defeated! As long as Mavericks exist... As long as evil exists in the minds of humans... I'll come back again and again! X, ZERO... I'll pursue you to the end of the world! Bwah ha ha ha! Farewell! FOR NOW!! Bwah ha ha!|Sigma}}<!--()-->
   
  +
Targeting the [[Mother Computer (Mega Man X)|Mother Computer]] of the Maverick Hunter base, Sigma manipulates a young hacker named [[Techno]] and coerces the [[Shadow Hunters]] into working for him. His new servants hack the Mother Computer, wreaking havoc and forcing X to enter cyberspace to root them out.
'''Copy Sigma:''' Which one of us will be "toasted?" Let us see... You are not one of the chosen. Only we new Reploids may live in this new world! I've no use for flimsy prototypes!
 
</div>
 
</div>
 
<br style="clear:both;" />
 
===When Encountering the Real Sigma (at [[Sigma Palace]])===
 
<div style="float: left; margin-left:0.5em;" class="tabber">
 
<div class="tabbertab" title="X" style="width:630px; padding:10px;">
 
   
  +
Upon the defeat of Techno and the Shadow Hunters, Sigma reveals himself and faces X within cyberspace. Noticeably more confident than previous times, Sigma taunts X after he is beaten the first time and even calls his defeat at the end of Normal Mode merely a retreat. It is only when he is defeated on Hard Mode that he seems to succumb. However, he implies that he will return as long as not only Mavericks exist, but also as long as humanity retains evil minds.
'''Sigma:''' Welcome, Maverick Hunter. It's good to see you again, X. Our meeting was fated, X. Our destinies come to a head right here, right now. The time has come to usher in a new age. And you, X, are an essential part of it.
 
   
  +
{{clear}}
'''X:''' .........
 
  +
===''Mega Man X3''===
  +
[[File:Neo 2SigmaX3.jpg|thumb|right|250px|Sigma in ''Mega Man X3'']]
  +
{{Looking for|For more details, see [[Sigma/Mega Man X3]].}}
  +
{{Q|We meet again X... It was easy to corrupt that fool, Doppler. And I would have succeeded if you hadn't interfered. But we are always destined to meet, aren't we X? Let the eternal struggle begin!!|Sigma}}<!--()-->
   
  +
Sigma resumes his threat when he infects the Reploid scientist [[Dr. Doppler]] with the Sigma Virus, who had developed a revolutionary anti-virus to repel the Maverick Virus. He uses Doppler to stage a revolt in Dopple Town, converting the utopian city's reformed Mavericks into his new army.<ref>[http://mmxz.zophar.net/megamanxz/megamanx3/characters.shtml Mega Man Homepage - Mega Man X3: Characters]. Retrieved on 2007-8-6.</ref> In the disc version, a cutscene plays showing Dr. Doppler building Sigma a formidable new body with the latest in Reploid technology.
'''Sigma:''' Your dedication to what you refer to as ''"justice"'' is what first got me thinking... I realized the imperfection of this world, and decided I must change it.
 
   
  +
Once Dr. Doppler is defeated by X, he feels remorse for his Maverick actions and reveals Sigma's lair under [[Dr. Doppler's Laboratory]]. Sigma is hunted by X and battles him with a shield and flamethrower, but is defeated. Sigma then emerges in a heavily-armored form, {{Nihongo|'''"Kaiser Sigma"'''|カイザーシグマ|Kaizā Shiguma}}, to fight him again.<ref>[http://www.youtube.com/watch?v=RCY8Y-T8usA#at=319 ''Mega Man X3'' ending.]</ref>
'''X:''' Don't blame me for your insanity, Sigma!
 
   
  +
Upon this body's destruction, the Sigma Virus itself appears as a wire-frame head and threatens to possess X's body to replace his own. After chasing X through the flaming base, Sigma finally corners him. If Zero did not end up wounded during the game, Zero appears with Doppler's anti-virus on his saber to erase the Sigma Virus for the time being. If Zero did end up wounded, Doppler appears with the anti-virus on his own body and self-destructs to apparently erase the Sigma Virus.
'''Sigma:''' Ha ha ha... It's too late, X. The gears are in motion. There's no turning back now. My children were the ones, X. The new generation Reploids were the ones. My children are responsible for the development of space. Mankind's lifeline...
 
   
  +
{{clear}}
'''X:''' Children!? What are you talking about?
 
  +
===''Mega Man Xtreme 2''===
  +
{{Looking for|For more details, see [[Sigma/Mega Man X2]].}}
  +
{{Q|But this time, I have to thank you for doing that. Actually, Berkana went too far. Although, she did help me by keeping me entertained for a while. Hee hee hee.|Sigma}}
  +
In ''[[Mega Man Xtreme 2]]'', Sigma appears in Extreme Mode after the defeat of [[Berkana]] or [[Gareth]] (depending on if the player is X or Zero), where it's revealed he had planted the seeds leading to the [[Erasure]] incident. In a rare instance, he is pleased that X defeated Berkana, claiming that her greed went much too far.
   
  +
Sigma's first form is the same as his Neo Sigma body from ''Mega Man X2'', but his second form is {{Nihongo|'''"Sigma Beast"'''|シグマビースト|Shiguma Bīsuto}}, a large [[Ride Armor]].<ref>''[[Compendium of Rockman X]]'' page 137</ref> The color of his second form is initially orange, but later alternates between blue and red, which can only be damaged by X while he is blue, and by Zero when red. His weak point is the large lion-like face in his chest.
'''Sigma:''' The Jakob Project... The program that gave birth to the new generation Reploids... It was all my doing! The world that was birthed by that plan rightfully belongs to me! Now, X... You will be destroyed along with the rest of this decayed world!
 
</div>
 
<div class="tabbertab" title="Zero" style="width:630px; padding:10px;">
 
   
  +
{{clear}}
'''Sigma:''' Zero... Who could have imagined that we'd cross paths at the end of the world. The moment your virus entered my system, the seed had been planted. That's when it all began... The destruction of the world!"
 
  +
===''Mega Man X4''===
  +
[[File:X4Sigma.jpg|thumb|right|250px|Sigma in ''Mega Man X4'']]
  +
{{Looking for|For more details, see [[Sigma/Mega Man X4]].}}
  +
{{Q|Repliforce are the fools this time! Now, all that's left is to destroy Earth with the very weapon they made!|Sigma}}
   
  +
Sigma was thought to be suppressed forever after receiving the anti-virus created by Doppler, but he still manages to return. Assuming a [[Wikipedia:Death (personification)|Grim Reaper]]-like appearance, Sigma meets with [[General]], the leader of the benevolent militia [[Repliforce]]. He provokes feelings of doubt and paranoia of the Maverick Hunters within General, revealing that Sigma's latest plan is to conspire against Repliforce and turn it into a rogue enemy of the world.<ref>'''Sigma:''' Hee hee hee. My plan to keep Repliforce and the Maverick Hunters at each others' throats worked perfectly! --''Mega Man X4'' 1997 (US)</ref>
'''Zero:''' I've heard about enough of this garbage, Sigma.
 
   
  +
In the game's inciting incident, Sigma orders [[Magma Dragoon]] to bomb the airborne metropolis [[Sky Lagoon]], killing thousands and causing a rift to form between Repliforce and Maverick Hunters. This rift quickly becomes an all-out war as Repliforce refuses to cooperate and even stages a coup d'état to make a new land for Reploids. During the [[Great Repliforce War]], Sigma allows Magma Dragoon to finally get his chance at a fight with X and Zero, and also has [[Cyber Peacock]] and [[Split Mushroom]] fight them to test their capabilities. He also sends a sleeper agent, [[Double]], into the Maverick Hunters' ranks, meant to strike when the time is right to destroy the 17th Unit and damage X's trust.<ref>''Mega Man X4''<br />''(Something beeps from within Double, and he presses on a panel on his chest. A mysterious voice is then heard.)'' // '''Mysterious Voice (Sigma):''' It's me! Those hunters must not be allowed in here! Terminate them!! // '''Double:''' Roger... (turns back to the Hunters)</ref>
'''Sigma:''' Don't get angry, Zero. I'm actually indebted to you. It is because of you that my children are able to create this magnificent new world in space.
 
   
  +
With in-fighting between the Maverick Hunters and Repliforce threatening to destroy them both, Sigma increases his influence over General's paranoia. General, formerly an outspoken advocate of Reploid independence, loses all faith in peace and prepares a satellite attack on the humans, which is Sigma's real intention.<ref>'''General:''' ...We're going to build a nation for the Reploids. That's our ultimate goal. We'll fight anyone who tries to interfere with our independence. --''Mega Man X4'' 1997 (US)</ref> Fortunately, X or Zero storm the [[Final Weapon]] and stop General before he can turn the weapon's sights on Earth - however, the weapon begins to prepare for attack anyways, revealing that someone else is controlling it.
'''Zero:''' Children? .........
 
   
  +
In the end, Sigma is revealed as the true mastermind. In Zero's story, Sigma reveals a portion of Zero's past involving their first encounter. He then battles X or Zero himself, armed with a new body and a scythe with a beam blade. Once this body is destroyed, he attacks again with a collection of several bodies, including {{Nihongo|'''Gunner Sigma'''|シグマガンナー|Shiguma Gannā}} and {{Nihongo|'''Earth Sigma'''|アースシグマ|Āsu Siguma}}.<ref>''[[Mega Man X Legacy Collection]]''</ref> After this ultimate defeat, Sigma reveals that the Final Weapon is still ready to strike the Earth - fortunately, General sacrifices himself to stop it from firing. Despite this apparent defeat at the Hunters' hands, Sigma still succeeded in part by destroying Repliforce, and by causing X and Zero to begin doubting their own morality.<ref>[http://mmxz.zophar.net/megamanxz/megamanx4/characters.shtml Mega Man Homepage - Mega Man X4: Characters]. Retrieved on 2007-8-6.</ref>
'''Sigma:''' That's right. The new generation Reploids born of the Jakob Project all bear copy chips containing my personal data. Now, the end of the world, and of you, has come! Farewell!
 
</div>
 
<div class="tabbertab" title="Axl" style="width:630px; padding:10px;">
 
'''Sigma:''' Hmpf. So you must be the one they call Axl... The prototype of the new Reploids. I'm surprised you've made it this far.
 
   
  +
{{clear}}
'''Axl:''' Hey... Stop calling me a prototype. I'm me. And you... You're a Maverick.
 
   
  +
===''Mega Man X5''===
'''Sigma:''' You are a puny and weak prototype! Nothing more! Your copy ability is far from developed. That's why you were left out.
 
  +
[[File:X5Sigma.jpg|thumb|right|250px|Psycho Sigma in ''Mega Man X5'']]
  +
{{Looking for|For more details, see [[Sigma/Mega Man X5]] and [[Sigma Head]].}}
  +
{{Q|You'd almost fully evolved to your true self... It's a shame you didn't quite make it, Zero. You had so much potential. Oh well, farewell! Well...it's only you now, X... I will let you live this time. But I won't be so kind next time, and there WILL be a next time! See you soon! You... The strongest Reploid! Bwah ha ha!|Sigma}}<!--)-->
   
  +
It is some time before Sigma resurfaces again. During his absence, Sigma traces Zero's origins to Dr. Wily and learns of a way to restore him to his original, destructive nature. It is also indicated that Sigma met Dr. Wily in person somehow, though the details are left a mystery.<ref>'''Sigma:''' "Heheheh, don’t get too worked up…I’m close…hey, Zero…so I met this old man…and that old man told me that you were the world’s strongest…who is that old man?" - Final Sigma W with Zero, ''Mega Man X5''</ref> The first part of Sigma's new plot involves hiring the mercenary [[Dynamo]] to sabotage the space colony [[Eurasia]] with a virus and prepare it to crash into the Earth.
'''Axl:''' The Mavericks are one club I'd prefer to be left out of!
 
   
  +
Once Dynamo is in position, Sigma reveals himself to the Maverick Hunters and occupies a giant statue while infecting new Mavericks in the city. He is confronted by one of the Hunters, X or Zero, and injures them, while the other follows to destroy his [[Sigma Head]] form.
'''Sigma:''' Only the pure new generation Reploids - my children - are worthy!
 
   
  +
However, upon Sigma's explosion, the Sigma Virus begins spreading all over the Earth faster than ever. The entire world is thrown into a panic, but to make matters worse, Dynamo sends the Eurasia colony on a collision course with the Earth too. This combination overwhelms the Maverick Hunters, and regardless of their efforts, large pieces of the colony still hit the planet, causing massive damage and revealing a new virus called the Colony Virus. This virus mixes with the Sigma Virus, synthesizing the [[Zero Virus]] and summoning a [[Cyberworld|cyberspace]] area called [[Zero Space]] where Sigma hides.
'''Axl:''' Your children?
 
   
  +
This was Sigma's ultimate goal: to flush Zero's body with a powerful virus to restore him to his [[Awakened Zero|original]] programming, as intended by Wily. Despite the creation of the Zero Virus and the ensuing battle between X and Zero, Sigma ultimately fails in this endeavor, as both X and Zero still manage to defeat him in both of his new bodies, {{Nihongo|'''Psycho Sigma'''|サイコシグマ|Saiko Shiguma}} and the gargantuan {{Nihongo|'''Final Sigma W'''|ファイナルシグマW|Fainaru Shiguma W}}.<ref>''[[Mega Man X Legacy Collection 2]]'' Hunter Medals and [[X Challenge]]</ref>
'''Sigma:''' Yes, prototype... My children. The new generation Reploids born of the Jakob Project all bear copy chips containing my personal data. And now, the final phase of that project begins! You shall be destroyed!
 
</div>
 
</div>
 
<br style="clear:both;" />
 
===When Grasped by Sigma (as X)===
 
<div style="float: left; margin-left:0.5em;" class="tabber">
 
<div class="tabbertab" title="X - with Zero" style="width:630px; padding:10px;">
 
''(X engages Sigma in battle, but is almost beaten halfway through the fight. Sigma grabs X by the face and holds him above his head.)''
 
   
  +
In the aftermath of the battle, the remains of Sigma's head lying nearby suddenly become active and fire an energy laser directly at X and Zero, hitting both of them in the chests. As Zero's body falls from X's grasp, he manages to fire one last blast from his Z-Buster that finishes Sigma. As hypothesized by [[Alia]] earlier in the game, Sigma is severely weakened and unable to resurrect himself anymore due to the stress of spreading his Sigma Virus around the globe.<ref>'''Alia:''' "Since Sigma scattered a large amount of the Virus, he doesn't have any energy left to reproduce himself..." - After defeating Dark Necrobat, ''Mega Man X5''</ref>
'''Sigma:''' Wallow in despair and hopelessness! The plan to destroy the world you so love is finally coming to fruition! I shed no tears for you and your kind! Ha ha ha ha ha! It will all be over soon!
 
   
  +
===''Mega Man X6''===
''(X struggles to speak.)''
 
  +
[[File:X6Sigma.jpg|thumb|right|250px|Sigma in ''Mega Man X6'']]
  +
{{Looking for|For more details, see [[Sigma/Mega Man X6]].}}
  +
{{Q|Bha ha ha ha! Not Yet! THE BADDLE HAZ JUSD BEGUNN! DIE! XXX! JUSDIE, X!|Sigma}}<!--()-->
   
  +
Three weeks pass as the human population moves underground to survive the devastation left by Sigma's last attack. Meanwhile, a renegade Reploid scientist, [[Gate]], plans to use a newfound power known as the [[Nightmare Phenomenon|Nightmare]] to rule a world of only the most advanced Reploids. However, as a failsafe he also uncovers Sigma's remains and rebuilds him, keeping him in his [[Secret Lab]] as a last resort weapon. Due to the stress of spreading the Sigma Virus, Sigma's programming is still damaged beyond what Gate can repair, and he is reduced to a half-conscious and barely-functioning wreck of his former self. He knows little more than his rage toward X and Zero and speaks in a garbled voice, barely able to form sentences. Additionally, Gate's work on Sigma's new body is unfinished by the time he appears.
'''X:''' Even if you were behind the Jakob Project... I won't give up until I've put a stop to your evil scheme!
 
   
  +
Upon Gate's defeat at the hands of the Maverick Hunters, he reluctantly releases Sigma to attack them. However, Sigma refuses to cooperate and needlessly kills Gate before challenging the Hunters to face him deeper within the Secret Lab. They pursue him and he attacks using his incomplete body, but is defeated. After this first form, Sigma emerges as a gigantic unfinished body with a skeletal appearance named {{Nihongo|'''Hell Sigma'''|ヘルシグマ|Heru Shiguma}}, and is again destroyed.
''(Sigma continues to choke X, when suddenly, Zero arrives and slashes at Sigma, in turn freeing X.)''
 
   
  +
{{clear}}
'''Zero:''' Hey, am I late?
 
   
  +
===''Mega Man X7''===
'''X:''' Zero! Are you alright?
 
  +
[[File:SigmaBustMMX7.jpg|thumb|right|250px|Head shot of Sigma's first form.]]
  +
{{Looking for|For more details, see [[Sigma/Mega Man X7]].}}
  +
{{Q|That's right, folks! I'll do it again, and AGAIN! I will make X AND Zero MINE! Now, come and get me! Give me a good fight, like you always do!|Sigma}}<!--()-->
   
  +
After hearing of [[Red Alert]]'s success in recovering the Virus Program Σ-02 from [[Aluce and Cedar|Cedar and Aluce]], Sigma decided to get in contact with the vigilante syndicate for his next plan.<ref>''[[Rockman X7 Original Soundtrack]]'' booklet</ref> Sigma met with [[Red]], this time under the alias of "The Professor", and informed him of his plan to use the mysterious Reploid [[Axl]] to copy the [[DNA program]]s of X and Zero for immense power boosts. Before putting this plan into motion, he proved his worth to [[Red]] by using the DNA Axl took from other Reploids to give power boosts to Red and his colleagues first. Many of the Reploids whom Axl was made to target to make DNA powerups were mostly innocent, irking Axl. This ended up helping him realize something was going on, and it prompted him to seek asylum with the [[Maverick Hunter]]s.
'''Zero:''' Don't worry about me. We've got business to take care of here.
 
   
  +
This forced Sigma to find a way to bring Axl back into Red Alert's service. He secretly infected the eight Red Alert generals, blackmailing Red into following his orders and challenging the Maverick Hunters for custody of Axl. Once all eight of Red Alert's generals were defeated by the Hunters, Red leaked them the location of the [[Crimson Palace]], which they then infiltrated. The Hunters fought Red, but he let himself be destroyed in his base's self-destruction protocol out of grief and shame for his actions, and in order to keep himself from being further manipulated by Sigma.
'''Sigma:''' Ha ha ha... What's this? Your friends arrived, eh? No matter! You are powerless in the face of the ruler of the new world! Powerless!
 
</div>
 
<div class="tabbertab" title="X - with Axl" style="width:630px; padding:10px;">
 
   
  +
Afterward, the Hunters continued on to confront Sigma, who was excited to see his old rivals again. After they defeated both of his forms, Sigma reappeared once more (appearing similar to his first form in ''Mega Man X6'') and punched Axl through a wall before vowing to X and Zero that he would again return in a new body. Red, who had presumably died, suddenly reappeared, and Sigma attempted to possess him and regain his strength. However, Red revealed himself to actually be Axl copying Red's form, who then proceeded to blast Sigma out of a window.
''(X engages Sigma in battle, but is almost beaten halfway through the fight. Sigma grabs X by the face and holds him above his head.)''
 
   
  +
Unusually for most games in the ''X'' series, Sigma is never identified by name.
'''Sigma:''' Wallow in despair and hopelessness! The plan to destroy the world you so love is finally coming to fruition! I shed no tears for you and your kind! Ha ha ha ha ha! It will all be over soon!
 
   
  +
{{clear}}
''(X struggles to speak.)''
 
   
  +
===''Mega Man X8''===
'''X:''' Even if you were behind the Jakob Project... I won't give up until I've put a stop to your evil scheme!
 
  +
[[File:X8Sigma.jpg|thumb|right|250px|Sigma in ''Mega Man X8'']]
  +
{{Looking for|For more details, see [[Sigma/Mega Man X8]].}}
  +
{{See also|Copy Sigma}}
   
  +
{{Q|[[X|Your]] dedication to what you refer to as "justice" is what first got me thinking... I realized the imperfection of this world, and decided I must change it.|Sigma}}<!--()-->
''(Sigma continues to choke X, when suddenly, Axl arrives and blasts Sigma, in turn freeing X.)''
 
   
  +
Sigma reappears for presumably the last time during the [[Jakob Project]]. A [[New Generation Reploid|new generation]] of Reploids goes into production, each containing advanced [[Copy Chip]]s that give them complete immunity to Maverick compromises such as the Sigma Virus. X witnesses this first-hand when an elevator car full of Reploids crashes at the [[Jakob Orbital Elevator]], and he finds the car is full of Reploids who copied Sigma's durable frame to survive the impact. [[Lumine]] assures X it is a safe process, but X is still bothered by it.
'''Axl:''' Hey! I'm here!
 
   
  +
Soon after the [[New Generation Reploids|new generation Reploids]] begin their riot, [[Alia]] discovers that their Copy Chips also bear Sigma's program - not just his body's DNA, but his actual program data. This confirms Sigma's involvement in the uprising. It appears the new generation Reploids are well aware of Sigma's influence and entirely willing to work for him; their relationship is like that of a father and his children.
'''X:''' Axl!
 
   
  +
After the Maverick Hunters defeat the eight major new generation Reploids, Sigma personally contacts Hunter Base. He announces that he and his kind are fleeing to space to leave the old world behind, daring the Hunters to pursue him via Jakob. Once the Hunters arrive in [[Gateway]], they confront what appears to be Sigma himself - however, defeating it reveals it was just a [[Copy Sigma]].
'''Axl:''' The gang's all here, huh X? Well, let's go mop the floor with that evil scum!
 
   
  +
Alia locates a [[Sigma Palace]] on the surface of the Moon, and the Hunters head there. Once one of them reaches the throne room (the other having been separated by Vile's attack), Sigma welcomes them in an incomplete body; this body is stronger than any of his previous forms, though it has a weak point in the chest.<ref name="Hisshou">Rockman X8 Hisshou Kouryakuhou - pp. 117-119</ref> He tells X his unique mind is what first inspired his ambitions, thanks Zero for giving him the Maverick Virus, and calls Axl a worthless prototype. Sigma then strikes, and is able to immobilize the Hunter present as he gloats in victory. However, the other Hunter arrives just in time to save their partner, and the two work together to defeat Sigma. The Maverick explodes, reduced to a pile of rubble.<ref>Sigma Palace, ''Mega Man X8''. (Normal or Hard Mode).</ref>
'''Sigma:''' Ha ha ha... What's this? Your friends arrived, eh? No matter! You are powerless in the face of the ruler of the new world! Powerless!
 
</div>
 
</div>
 
<br style="clear:both;" />
 
===When Grasped by Sigma (as Zero)===
 
<div style="float: left; margin-left:0.5em;" class="tabber">
 
<div class="tabbertab" title="Zero - with X" style="width:630px; padding:10px;">
 
''(Zero engages Sigma in battle, but is almost beaten halfway through the fight. Sigma grabs Zero by the face and holds him above his head.)''
 
   
  +
Suddenly, Lumine appears and congratulates the Hunters for defeating Sigma. He explains that he and the new generation Reploids took advantage of Sigma's ambition to reach outer space, now planning to dispose of older Reploids such as X, Zero, Axl, and even Sigma as well, for they are not needed in the new world. The Hunters fight and defeat Lumine, but during his final moments he makes a startling claim: Sigma was destroyed for good and would never return.
'''Sigma:''' Wallow in despair and hopelessness! The plan to destroy the world you so love is finally coming to fruition! I shed no tears for you and your kind! Ha ha ha ha ha! It will all be over soon!
 
   
  +
Sigma had expressed an uncharacteristic disbelief after X, Zero, and Axl defeated him on the Moon, crying out in anguish rather than promising to return as usual. This shows he may have been aware it was his final demise; this also explains his insistence on creating a new world for his "children" Mavericks, paving a road for the future knowing that his time was up. It is also speculated that Sigma could no longer regenerate because he was on the Moon with a lack of available bodies to possess, and the vastness of space may have weakened his lingering consciousness to deletion. However, having passed on his data to new generation Reploids who can turn Maverick without remorse, Sigma's dreams of Reploid evolution and supremacy were still primed to carry on into the future.
''(Zero struggles to speak.)''
 
   
  +
=== Post-''Mega Man X'' series ===
'''Zero:''' Sigma! As long as I still function, you won't get your happy ending!
 
  +
Although Sigma himself never returned in person, his extremist ideas and the Sigma Virus continued to plague the world with Mavericks, until the creation of the [[Dark Elf|Mother Elf]] from Zero's body. X utilized the Mother Elf to fully neutralize the Sigma Virus, bringing a permanent end to the Maverick Wars that Sigma started. Unfortunately, this series of events would later lead to the far more destructive [[Elf Wars]], due to [[Dr. Weil]]'s radical agenda to punish the Reploids for the chaos of the Maverick Wars.
   
  +
{{clear}}
''(Sigma continues to choke Zero, when suddenly, X arrives and blasts Sigma, in turn freeing Zero.)''
 
   
  +
==Other game appearances==
'''X:''' Zero! Are you alright?
 
  +
[[File:PXZ2 Sigma.png|100px|right|Sigma in ''Project ✕ Zone 2'']]
  +
* Sigma makes a cameo on the monitors in the ''[[Mega Man X: Command Mission]]'' opening cutscene, as part of scenes from the ''Mega Man X7'' ending.
  +
*Psycho Sigma is a boss in ''[[Mega Man X Legacy Collection 2]]''<nowiki>'</nowiki>s [[X Challenge]] mode, being fought in stage 6-3 alongside [[Zero Nightmare]].
  +
*In ''[[Rockman Xover]]'', Sigma, [[Doctor Albert W. Wily|Dr. Wily]], and other villains from other ''Mega Man'' series, join forces to wreak havoc. His ''Mega Man X'' form is the boss of World 2 and his ''Mega Man X8'' form is the boss of World 7, and he also appeared in several [[Battle Memory|Battle Memories]].
  +
*Sigma's body from ''Mega Man X4'' is one of Chuck Greene's costumes in the ''[[Dead Rising 3]]'' DLC mode "Super Ultra Dead Rising 3' Arcade Remix Hyper Edition EX Plus α". He attacks with his scythe and laser eye, and has a special attack called "Sigma Crusher".
  +
*Sigma's ''Mega Man X4'' body appears in ''[[Project X Zone 2|Project ✕ Zone 2]]'' as an enemy unit,
  +
*Sigma appears as a Spirit in ''[[Super Smash Bros. Ultimate]]'' with his art from ''Mega Man Maverick Hunter X''. He is an Attack-type Primary Spirit in the "Ace" class. In Adventure Mode, Sigma guards the way to unlocking Mega Man. The playable character representing him is [[w:c:zelda:Ganondorf|Ganondorf]], and the theme music is "X vs. Zero" from ''Mega Man X5'', alluding to how Sigma largely instigated X and Zero's fight in that game.
  +
*Sigma appeared as a Unit Card and in the illustrations of several Action Cards in ''[[TEPPEN]]''.
  +
*Sigma appeared in ''[[Street Fighter × All Capcom]]''.
   
  +
{{Japanonly}}
'''Zero:''' X, you're OK!
 
  +
*Sigma appeared as an event character in the Japanese version of ''[[Zombie Cafe]]''.
  +
*Neo Sigma appeared as an event character in ''[[Dragon Poker]]''.
  +
*Sigma appeared as an event character in ''[[Elemental Story]]''.
  +
*Sigma appeared as an event character in ''[[Tower of Saviors]]''.
  +
*In the ''Rockman X DiVE'' event from the Taiwanese version of ''[[Shironeko Project]]'', a Sigma Virus left the ''Rockman X DiVE'' cyberworld and entered the ''Shironeko'' world, mutating into [[Sikuma]] (romanized as SIGUMA and SIKUMA in the game). He is the final boss from the event story, and the event's co-op boss, being fought in a form similar to the Sigma Head from ''Mega Man X5''.
  +
{{JapanonlyEND}}
   
  +
===''[[Mega Man X DiVE]]''===
'''X:''' I'm just glad I made it in time. Let's go!
 
  +
Sigma is present in various forms in ''Mega Man X DiVE'', both as playable [[Hunter Program]]s and as bosses. In the game's story, Sigma often appears as a vessel of the Sigma Virus, but near the end of of the game he also appears in his pre-Maverick form as an ally to the Player.
   
  +
==== Hunter Programs ====
'''Sigma:''' Ha ha ha... What's this? Your friends arrived, eh? No matter! You are powerless in the face of the ruler of the new world! Powerless!
 
  +
* Sigma's first form from ''Mega Man X'' is an S rank Hunter Program. His Active Skills are Blade Dash and Head Beams.
</div>
 
  +
* [[Sigma (X4 2nd form)]], based on his reaper-like appearance in ''Mega Man X4'', is a DiVE Festival-exclusive Hunter Program. His Active Skills are Scythe Throw and Laser Eye.
<div class="tabbertab" title="Zero - with Axl" style="width:630px; padding:10px;">
 
  +
*Sigma in a formal devil-like outfit, known as '''Halloween Sigma''', is a seasonal Hunter Program. His Active Skills are Penta Bat Shot and Hellfire Dust. Despite his appearance, this form has the personality and memories of his time as a Maverick Hunter, and is very generous, hiding several treats during Halloween for others to find.
  +
*Sigma in a [[Wikipedia:Banchō (position)|banchō]] (Japanese delinquent commander) outfit, known as '''Gangsta Boy Sigma''', is a Festival-exclusive Hunter Program. Similar to his Halloween version, Gangsta Boy Sigma has a personality similar to the time before he fought Zero, always protecting his surbodinates and keeping the mood positive. However, he does not like negligence to training, believing that a Hunter should always aim to the top, setting himself as an example of the top his surbodinates should aim to achieve.<ref>[https://twitter.com/RX_DiVE/status/1564539672537309185 ''Rockman X DiVE'' official Twitter]</ref> His Active Skills are Duel Invitation and Lethal Combo.
   
  +
==== Bosses ====
''(Zero engages Sigma in battle, but is almost beaten halfway through the fight. Sigma grabs Zero by the face and holds him above his head.)''
 
  +
*Sigma's first form from ''Mega Man X'' appeared as a boss in the Story stages 19-6 and 20-5. He fights with his usual attack pattern, but also additional attacks including his 5 Bullet Shot and Electromagnetic Wave from ''Mega Man X2'', and his Rapid-Fire Flame Shot from ''Mega Man X3''.
  +
*[[Wolf Sigma]], Sigma (X4 1st form), Sigma (X4 3rd form), [[Final Sigma W]], [[Sigma Virus (Mega Man X2)|Sigma Virus]], [[Sigma/Mega Man X6|Hell Sigma]], and [[Sigma/Mega Man X3|Sigma (X3 1st form)]], all appeared as the bosses of Raid Boss and Guild Boss events.
  +
**Sigma Virus also appeared in the story stage 20-4, and Sigma's final forms from ''Mega Man X4'' to ''X6''appeared in other event stages as a manifestation of the Sigma Virus that was inside [[Droitclair]], [[Angepitoyeir]], and [[Eratoeir]].
  +
*Wolf Sigma's data was mixed with the data from a [[w:c:monsterhunter:Magnamalo|Magnamalo]] in the ''[[Monster Hunter Rise]]'' collab event "Mission Code: R・I・S・E", appearing as a boss called '''[[Magnamalo Sigma]]'''.
  +
*The third Halloween event stage had a modified version of Sigma (X4 1st form) named '''[[Flame Demon Sigma]]'''.
   
  +
===''[[Marvel vs. Capcom: Infinite]]''===
'''Sigma:''' Wallow in despair and hopelessness! The plan to destroy the world you so love is finally coming to fruition! I shed no tears for you and your kind! Ha ha ha ha ha! It will all be over soon!
 
  +
{{Main|Sigma (Marvel vs. Capcom series)}}
  +
Sigma appears as one of the main antagonists of the story mode in ''Marvel vs. Capcom: Infinite'', forming a villainous alliance with Marvel Comics' [[w:c:marvelvscapcom:Ultron|Ultron]]. He was later added to the game as a playable DLC character.
   
  +
==Other media==
''(Zero struggles to speak.)''
 
  +
===[[Mega Man (Ruby-Spears)|''Mega Man'' (Ruby-Spears)]]===
  +
[[File:Cartoonsigma2.jpg|thumb|230px|Sigma in the ''Mega Man'' cartoon show.]]
  +
Sigma is referred to in the episode [[Mega X]] of the Ruby-Spears ''Mega Man'' animated series, where X, Vile and [[Spark Mandrill]] go back in time. Vile and Spark Mandrill's goal was to obtain lightanium, a material worth a fortune in the future, in order to fund Sigma's rebellion. His profile, shown by X, shows him in his first body and mistakenly spells his name as '''Cigma'''. The only line Sigma has is when Vile contacts him near the end of the episode — a short praise: ''"Well done, Vile."''
   
  +
===[[Mega Man (Archie Comics)|''Mega Man'' (Archie Comics)]]===
'''Zero:''' Sigma! As long as I still function, you won't get your happy ending!
 
  +
{{main|Sigma/Archie Comics}}<!--()-->
   
  +
Sigma is the main antagonist from the ''Mega Man X'' era and the [[Worlds Unite]] crossover.
''(Sigma continues to choke Zero, when suddenly, Axl arrives and blasts Sigma, in turn freeing Zero.)''
 
   
  +
===[[Rockman X (manga)|''Rockman X'']] (manga)===
'''Axl:''' Hey! It's me, Axl!
 
  +
In the ''Rockman X'' manga, Sigma started his rebellion against humans by killing a Maverick Hunter, [[Kyle]], who protested against him. Sigma then convinced various Hunters to join him by declaring that Reploids are superior to humans and they should no longer obey them. When [[Spark Mandrill]] surrendered to X and was about to leak Sigma's plans, Sigma used a giant hologram of himself (via a flying mechanism) to kill Mandrill and taunt X. Before the fight with [[Armored Armadillo]], it was shown that Sigma scarred Armadillo's left eye because he didn't follow his orders to attack X in the forest. Once the eight Mavericks were all destroyed, Sigma challenged X to face him in his space fortress. Sigma was defeated by X in the ensuing battle, but Sigma then used his giant Wolf Sigma body to overpower him. This forced X to crash the entire fortress to defeat Wolf Sigma.
   
  +
In ''Rockman X2'', Sigma was shown to have survived the crash, staying in hiding while working on a more powerful body. He and the X-Hunters initiated a plan to corrupt good Reploids and force them to go Maverick. Still, after the defeat of eight Mavericks and the X-Hunters, Sigma was defeated by X and Zero working together.
'''Zero:''' Axl!
 
   
  +
In ''Rockman X3'', Sigma took control of Dr. Doppler to start another Maverick uprising, using him to infect Reploids with "[[Worm]]s" and create a super powerful body by analyzing X. After Doppler's defeat, Sigma had a fierce battle against X, but was eventually defeated using the Z-Saber. He then revealed a more powerful body, Kaiser Sigma, and completely destroyed X with it. To Sigma's surprise, X regenerated and with [[Armor Parts (Mega Man X3)|golden armor]], using this new power to destroy Sigma with a punch. Sigma also appeared disguised as an angel when a worm infected X, telling him he couldn't enter paradise due to his "sins" in an attempt to cast doubt, although X eventually saw through the illusion and shot Sigma.
'''Axl:''' Looks like I've made it in time. What do you think of me now, Zero?
 
   
  +
Sigma only had a cameo appearance in the ''Rockman X4'' manga, being mentioned by Double in the last chapter where the traitor made clear Sigma was the true instigator of the [[Great Repliforce War]].
'''Sigma:''' Ha ha ha... What's this? Your friends arrived, eh? No matter! You are powerless in the face of the ruler of the new world! Powerless!
 
</div>
 
</div>
 
<br style="clear:both;" />
 
===When Grasped by Sigma (as Axl)===
 
<div style="float: left; margin-left:0.5em;" class="tabber">
 
<div class="tabbertab" title="Axl - with X" style="width:630px; padding:10px;">
 
''(Axl engages Sigma in battle, but is almost beaten halfway through the fight. Sigma grabs Axl by the face and holds him above his head.)''
 
   
  +
===''[[Irregular Hunter Rockman X]]''===
'''Sigma:''' Wallow in despair and hopelessness! The plan to destroy the world you so love is finally coming to fruition! I shed no tears for you and your kind! Ha ha ha ha ha! It will all be over soon!
 
  +
<!--{{Q|かならずやわたしは世界を征服してみせる!!|Sigma}}-->
  +
Sigma appears as the leader of the Maverick Hunters. When Storm Eagle challenges X to a fight, Sigma appears and stops Storm Eagle without destroying him, giving him a lecture and the [[Storm Tornado]] to X. However, when Zero starts acting strangely, Sigma tells Armored Armadillo that Zero became a Maverick and orders him to destroy Zero. Later, Vile escapes from his cell and takes four Hunters to work for him. After the defeat of the four Hunters, Sigma orders X to go after Zero and destroy him, but Zero reveals Sigma's involvement in the events, and they are attacked by Vile, Storm Eagle, Armored Armadillo, and Boomer Kuwanger. After the defeat of the latter three, Vile escapes and Sigma decides to destroy the base of the Maverick Hunters. After talking with [[A-1]], X and Zero go after Sigma, who started attacking the city with several Mechaniloids. Sigma appears to face the two Hunters, but after being hit by two charge shots at the same time, He calls Vile and shows that they took A-1 as hostage, taking advantage over X. Unable to see X taking so many hits, A-1 releases himself and runs to Sigma, self-destructing near him. Sigma is stunned by the explosion, and X, angry and sad for A-1, fires a large charge shot, and Zero also fires one at the same time, but Vile saves Sigma and they escape. While leaving, Sigma tells them that he will surely conquer the world.
   
  +
===''[[Rockman X The Novel: Irregulars Report]]''===
''(Axl struggles to speak.)''
 
  +
{{Expandsection}}
   
  +
Sigma was created by Dr. Cain as his masterpiece. However, upon investigating the ruins where he fought against a Maverick Zero, he discovered the truth about X and the Reploids and was filled with hatred for being simply a copy of X, which led to his plan to rebel against humanity and test X's abilities.
'''Axl:''' Ha! If I give up now, all my efforts would be wasted. I refuse to give up!
 
 
''(Sigma continues to choke Axl, when suddenly, X arrives and blasts Sigma, in turn freeing Axl.)''
 
 
'''X:''' Axl! Are you OK?
 
 
'''Axl:''' X! So you made it, too...
 
 
'''X:''' There's no time to lose! Let's finish this!
 
 
'''Sigma:''' Ha ha ha... What's this? Your friends arrived, eh? No matter! You are powerless in the face of the ruler of the new world! Powerless!
 
</div>
 
<div class="tabbertab" title="Axl - with Zero" style="width:630px; padding:10px;">
 
 
''(Axl engages Sigma in battle, but is almost beaten halfway through the fight. Sigma grabs Axl by the face and holds him above his head.)''
 
 
'''Sigma:''' Wallow in despair and hopelessness! The plan to destroy the world you so love is finally coming to fruition! I shed no tears for you and your kind! Ha ha ha ha ha! It will all be over soon!
 
 
''(Axl struggles to speak.)''
 
 
'''Axl:''' Ha! If I give up now, all my efforts would be wasted. I refuse to give up!
 
 
(Sigma continues to choke Axl, when suddenly, Zero arrives and slashes at Sigma, in turn freeing Axl.)
 
 
'''Zero:''' Looks like I made it in time.
 
 
'''Axl:''' Zero! You made it!
 
 
'''Zero:''' Well, I couldn't leave the whole thing up to you, could I? C'mon... Let's go.
 
 
'''Sigma:''' Ha ha ha... What's this? Your friends arrived, eh? No matter! You are powerless in the face of the ruler of the new world! Powerless!
 
</div>
 
</div>
 
<br style="clear:both;" />
 
 
==See also==
 
* [[Sigma/Quotes]]
 
   
 
==Gallery==
 
==Gallery==
  +
{{Main|Sigma/Gallery}}
<gallery widths="150">
 
EarlySigmaConcept.jpg|Sigma's early concept art by [[Keiji Inafune]].
 
WolfSigmaMMX.jpg|Wolf Sigma, Sigma's second battle form in ''[[Mega Man X (video game)|Mega Man X]]''.
 
MMX5Cutscene1.jpg|Sigma as seen in the opening cutscene of ''[[Mega Man X5]]''.
 
SigmaMHXConcepts.jpg|Sigma's ''[[Mega Man Maverick Hunter X|Maverick Hunter X]]'' concept art.
 
WolfSigmaConceptMHX.jpg|Wolf Sigma's ''Maverick Hunter X'' redesign.
 
MMX2NeoSigmaPose.jpg|Alternate artwork of Neo Sigma in ''[[Mega Man X2]]''.
 
MMX5Cutscene4.jpg|Neo Sigma as seen in the opening cutscene of ''Mega Man X5''.
 
KaiserSigma-MMX3.jpg|Kaiser Sigma, Sigma's second form in ''[[Mega Man X3]]''.
 
FinalSigmaWCharSheetX5.jpg|Sigma's character sheet for ''Mega Man X5''.
 
SigmasLastStandMMX5.jpg|Sketch of Sigma's "last" stand, seen in the ending cutscene of ''Mega Man X5''.
 
Sigma's1stFormConceptMMX7.jpg|Concept sketches of Sigma's 1st form for ''[[Mega Man X7]]''.
 
ColossusSigmaX7Concept.jpg|Concept sketches of Sigma's 2nd form in ''Mega Man X7''.
 
SigmabustX8.jpg|Copy Sigma and Sigma's normal appearance in ''[[Mega Man X8]]''.
 
SigmaMMX8ConceptArt.jpg|Sigma's concept art for ''Mega Man X8''.
 
onlinesigma.jpg|Sigma's ''[[Rockman Online]]'' illustration.
 
SFXACSigma.png|Sigma in ''[[Street Fighter x All Capcom]]''.
 
SFXACSigmaB.png|Sigma in ''Street Fighter x All Capcom''.
 
RXMSigma.jpg|Sigma in the ''[[Rockman X (manga)|Rockman X]]'' manga.
 
RXMSigmaAttack.png|Sigma in the ''Rockman X'' manga.
 
RXMWolfSigma.png|Wolf Sigma in the ''Rockman X'' manga.
 
RX2MSigma.jpg|Sigma in the ''Rockman X2'' manga.
 
RX2MSigmaVirus.jpg|Sigma in the ''Rockman X2'' manga.
 
RX3MSigma.jpg|Sigma in the ''Rockman X3'' manga.
 
RX3MKaiserSigma.jpg|Kaiser Sigma in the ''Rockman X3'' manga.
 
RX4MSigma.jpg|Sigma's cameo in the last chapter of the ''Rockman X4'' manga.
 
Rockmanxsamplesigma.png|Sigma in the ''[[Irregular Hunter Rockman X]]'' manga.
 
</gallery>
 
   
 
==Videos==
 
==Videos==
 
<gallery>
 
<gallery>
Mega Man X Sigma Final Stage|Mega Man X - Sigma Final Stage.
+
Mega Man X Sigma Final Stage|''Mega Man X'' - Sigma final stage.
  +
Megaman X2 Final Stage (SNES) (HD HQ)|''Mega Man X2'' - Final stage with Sigma battle.
Megaman Maverick Hunter X -PSP- Sigma Palace 4 & Ending 100%|Maverick Hunter X - Sigma Palace 4 & Ending 100%
 
Megaman X2 Final Stage (SNES) (HD HQ)|Mega Man X2 - Final Stage with Sigma Battle.
+
Megaman X3 Final Boss Battle|''Mega Man X3'' - Final battle with Sigma.
Megaman X3 Final Boss Battle|Mega Man X3 - Final battle with Sigma.
+
Mega Man X4 Zero Playthrough - Sigma (14 14)|''Mega Man X4'' (Zero) Sigma battle
Mega Man X4 Zero Playthrough - Sigma (14 14)|Mega Man X4 (Zero) Sigma Battle
+
Mega Man X5 Final Boss Battle (PlayStation)|''Mega Man X5''
Megaman X5 Final Boss Battle (PlayStation)|Mega Man X5 Final Battle with Sigma.
+
HQ Megaman X6 - Final Boss, Sigma|''Mega Man X6'' Sigma final battle.
  +
ロックマンX7 クリムゾンパレス シグマ戦|''Mega Man X7'' Sigma final battle (Japanese)
HQ Megaman X6 - Final Boss, Sigma|Mega Man X6 Sigma Final Battle.
 
  +
Megaman X8 Copy Sigma Hard Mode no damage|''Mega Man X8'' Copy Sigma battle in Hard Mode without damage.
ロックマンX7 クリムゾンパレス シグマ戦|Mega Man X7 Sigma Final Battle (Japanese)
 
Megaman X8 Copy Sigma Hard Mode no damage|Mega Man X8 Copy Sigma battle in Hard Mode without damage.
+
Megaman X8 Sigma Hard mode no damage|''Mega Man X8'' real Sigma battle in Hard Mode without damage.
Megaman X8 Sigma Hard mode no damage|Mega Man X8 Real Sigma battle in Hard Mode without damage.
 
 
Sigma gameplay - Super Ultra Dead Rising 3 Arcade Remix Hyper Edition Ex Plus Alpha|Sigma in ''Dead Rising 3''.
 
Sigma gameplay - Super Ultra Dead Rising 3 Arcade Remix Hyper Edition Ex Plus Alpha|Sigma in ''Dead Rising 3''.
 
</gallery>
 
</gallery>
  +
  +
==See also==
  +
  +
*[[Sigma/Quotes]]
  +
*[[Sigma Virus]]
  +
*[[Sigma Head]]
  +
*[[Copy Sigma]]
  +
*[[Ultron Sigma]]
  +
*[[Sigma/Archie Comics]]
   
 
==Trivia==
 
==Trivia==
 
[[File:EarlyXHunterConcept.jpg|thumb|190px|Early designs that served as the basis for Sigma, and later the X-Hunters.]]
 
[[File:EarlyXHunterConcept.jpg|thumb|190px|Early designs that served as the basis for Sigma, and later the X-Hunters.]]
*Interestingly, Sigma was designed by merging a team of three other early villain designs created by Inafune during the early development of the first ''Mega Man X'' game. The same designs were later used again as the basis for the [[X-Hunters]] in ''Mega Man X2''.<ref>[[R20 Rockman & Rockman X Official Complete Works|Mega Man X Official Complete Works]], [[wikipedia:UDON|UDON Entertainment Corp]]. 2009. pg.93. Retrieved on April 8, 2011.</ref>
+
*Sigma was designed by merging three early villain designs created by Inafune during the early development of the first ''Mega Man X'' game. The same designs were later used as the basis for the [[X-Hunters]] in ''Mega Man X2''.<ref>[[R20 Rockman & Rockman X Official Complete Works|''Mega Man X Official Complete Works'']], [[UDON|UDON Entertainment Corp]]. 2009. pg.93. Retrieved on April 8, 2011.</ref>
*His appearance has a close similarity to both M. Bison and Sagat, both of whom are major villains of the ''Street Fighter'' series and both of whom were designed by Keiji Inafune.
+
**Sigma's face has a close similarity to both [[M. Bison]] and [[Sagat]], two major villains of the ''[[Street Fighter]]'' series. He also resembles Braiking Boss, the villain of ''Casshern''. Due to this, some fans believe that Sigma was based on one of them.<ref>[http://kobun20.interordi.com/2015/07/06/a-day-for-sigma/ The Reploid Research Lavatory: A Day For Sigma]</ref> The resemblance to M. Bison is even referenced in ''[[Project X Zone 2]]''.
  +
**During a 2008 Q&A session, when asked if Sagat served as inspiration for Sigma, [[Keiji Inafune]] stated that Sigma (and Zero) represent the idea that nothing is absolute.<ref>"Some people think he might have been inspired by Sagat from Street Fighter because of his look, but that's not actually the case. Sigma and Zero basically represent the idea that nothing is absolute. Sigma was a powerful leader of the Maverick Hunters but after Zero passed the virus to him, his allegiance changed. Circumstances can change anything, and nothing is absolute." --''Keiji Inafune'', 2008. [http://www.capcom-unity.com/s-kill/blog/2008/09/05/inafunesan_answers_your_questions Capcom-unity - Inafune-san Answers Your Questions!]</ref>
 
  +
*Sigma (Σ) is the 18th letter of the Greek alphabet and is used in mathematics to denote series, finite, or infinite sums of variables. The Σ symbol is often seen on Mavericks from Sigma's army. Interestingly, the sigma (Σ) letter was originated from the Phoenician letter sheen ('''W'''), which is similar to the English letter "[[Doctor Albert W. Wily|W]]".
*During a 2008 question and answer session, [[Keiji Inafune]] stated that Sigma (and Zero) represents the idea that nothing is absolute.<ref>"Some people think he might have been inspired by Sagat from Street Fighter because of his look, but that's not actually the case. Sigma and Zero basically represent the idea that nothing is absolute. Sigma was a powerful leader of the Maverick Hunters but after Zero passed the virus to him, his allegiance changed. Circumstances can change anything, and nothing is absolute." --''Keiji Inafune'', 2008. [http://www.capcom-unity.com/s-kill/blog/2008/09/05/inafunesan_answers_your_questions Capcom-unity - Inafune-san Answers Your Questions!]</ref>
 
  +
** Commentary by [[Keiji Inafune]] on concept art for Sigma made it clear that Sigma's connection to Dr. Wily was intended from the start.<ref>"The connection with Wily had always been part of the plan." - [[:File:EarlySigmaConcept.jpg|Sigma concept art]], Keiji Inafune, ''Mega Man X Complete Works''</ref>
 
  +
*The penultimate cutscene of Zero's story in ''Mega Man X4'' reveals Sigma's pre-Maverick design, which lacked his facial scars and the spikes on his wrists and knees featured on his original design. This design would be maintained for his pre-Maverick appearance in ''Maverick Hunter X'', with redesigned wrist guards. The single-frame flashback of this battle from ''Mega Man X5'', however, discards the redesign, instead using the standard Maverick Sigma design without facial scars.
*Sigma (Σ) is the 18th letter of the Greek alphabet, and is used in mathematics to denote series, finite or infinite sums of variables. The Σ symbol is often seen on Mavericks from Sigma's army. Interestingly, the Sigma (Σ) letter was originated from the Phoenician letter Sheen ('''W'''), which is similar to the English letter "[[Dr. Wily|W]]".
 
  +
*There are multiple interpretations of the way Sigma received his trademark eye scars:
 
  +
:#In ''Mega Man X4'', the Maverick Zero inflicted damage on Sigma's face resembling his future scars. However, the short film ''[[The Day of Σ]]'' featured in ''Mega Man Maverick Hunter X'' and ''Mega Man X Legacy Collection'' shows X inflicting scars upon his face at the start of his rebellion. (Though this is likely a retcon, it is theoretically possible that scars inflicted by Zero were repaired, only for new scars to be later inflicted by X).
*There are three variations on the way Sigma got the scars on his eyes:
 
  +
:#*Given that Sigma's subsequent bodies always feature facial scars even after prior bodies being destroyed, this implies that Sigma adopted their appearance for cosmetic reasons.
:#Zero damaged Sigma's face when they fought (as shown in an animated cutscene in ''X4'').
 
:#X damaged his face in ''[[The Day of Σ]]''. Ironically, after Sigma's head merges with the wolf robot in the game, his face resembles his face deformity received against Maverick Zero.
+
:#In ''Mega Man Maverick Hunter X''<nowiki/>'s OVA, ''[[The Day of Σ]]'', X scarred Sigma's face with his bare hand during their first confrontation. Later as Wolf Sigma, Sigma's damaged face ironically resembles the wounds he received from Maverick Zero in ''Mega Man X4''.
:#Sigma did it himself after going Maverick in the [[Rockman X (manga)|manga]], by using the heat of the "weapon" (his fingers) he used to shoot Kyle to make the scars.
+
:#In the [[Rockman X (manga)|''Rockman X'']] manga, Sigma scarred himself as a mark of going Maverick, using the heat of his fingertip guns after shooting Kyle.
  +
:# In ''[[Rockman X The Novel: Irregulars Report]]'', Sigma's scars were also implied to be self-inflicted. While communicating with Zero, Sigma is seen putting his right hand near his eyes, with his fingers having traces of Reploid blood on them.
 
  +
*''Mega Man X'' and ''Mega Man X3'' are the only games to have official artwork for Sigma's final boss forms in their respective games.
*Sigma's viral form from ''X8'' bears a slight resemblance to [[w:c:marvelvscapcom:Abyss|Abyss]] (first form) from ''Marvel vs. Capcom 2''.
 
  +
*If Sigma's name is entered as the player's name in ''[[Mega Man 9]]'', the game erroneously says that it is "inappropriate language", and changes it to "Si**a".<!--This is likely because the "gm" part of Sigma is the initial of Game Master, and Capcom doesn't want people to impersonate Capcom employees.-->
 
  +
*Sigma was set to appear in the cancelled game ''[[Rockman Online]]''.
*Sigma's normal form in ''Mega Man X8'' is a redesign of his armor from the first ''Mega Man X''.
 
  +
*Sigma was set to appear as a playable character in the cancelled game ''[[Capcom Super League Online]]''.
**Also, Sigma's "scars" in ''Mega Man X8'' do not really look like scars, rather just lines running down his face.
 
  +
*Although Sigma is never seen in the ''[[Mega Man Zero (series)|Mega Man Zero]]'' series, the Sigma Virus is mentioned in ''[[Mega Man Zero 2]]'' and ''[[Mega Man Zero 3]]'', and in the first game his symbol is visible (though difficult to spot in the background) in the left of the chamber where Zero was resting. Sigma also makes a cameo in the ''[[Rockman Zero (manga)|Rockman Zero]]'' manga.
 
*If Sigma's name is entered as the player's name in ''[[Mega Man 9]]'', the game will say that it is "inappropriate language", and changes it to "Si**a".
 
 
*Although Sigma is never seen or mentioned in the ''[[Mega Man Zero (series)|Mega Man Zero]]'' series he does make cameo in the ''[[Rockman Zero (manga)|Rockman Zero]]'' manga.
 
 
*In ''Mega Man X8'', the copy of Sigma is weak against [[Dark Mantis]]' weapon, while the real Sigma is weak against [[Optic Sunflower]]'s weapon. Both weapons are based on darkness and light, respectively.
 
 
*In Ruby Spears ''Mega Man'', X mentions to Dr. Light that lightanium is worth billions in the future, which can fund Sigma's rebellion. This creates some confusion as to why Sigma ever needed funds, as he shows to not have any necessity to have funds for anything.
 
 
*Oddly, only the first and third ''Mega Man X'' games have official artwork for both of Sigma's forms.
 
 
*In the original ''Mega Man X'', Sigma berates X as he realized why Zero counted on him, while in the remake, he does no such thing, but commends X's ability to finally reach him.
 
 
*While Sigma does not appear directly in ''[[Project × Zone|Project X Zone]]'' at all, he was mentioned briefly by name in Chapter 20, the same chapter X and Zero officially join the party. 
 
*He appears in his X4 attire as a boss unit in the sequel, Project X Zone 2 
 
*In the original ''Mega Man X'', Wolf Sigma has floating hands. In ''Maverick Hunter X'', however, Wolf Sigma has arms and hands.
 
   
 
==References==
 
==References==
*[[Wikipedia:Sigma (Mega Man X)|Sigma's article on Wikipedia]]. Retrieved on 2007-10-7.
+
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Latest revision as of 03:22, 28 March 2024

"Wallow in despair and hopelessness! The plan to destroy the world you so love is finally coming to fruition! I shed no tears for you and your kind!"
―Sigma, Mega Man X8

Sigma (シグマ Shiguma) is the primary antagonist of the Mega Man X series. Once the commander of the Maverick Hunters, Sigma fell into insanity and turned Maverick himself, becoming the leader of all haywire Reploids in waging war on humanity. Although he has been destroyed countless times, Sigma's programming almost always survives and finds a new form, ready to menace the world once again.

He serves as the final boss in all mainline games in the series, except Mega Man X8 where he is the penultimate boss in Normal and Hard mode.

Appearance

Although Sigma has taken many diverse forms throughout the series, his designs maintain several consistent traits. He possesses a bald human head with a gem in his forehead and a cleft chin. His eyes are light blue or white, possessing no irises or pupils, and with a scar torn over each eye (sometimes the scars are merely cosmetic, such as in Mega Man X8 where they are lines running down his entire face). His tall and bulky frame resembles a muscular human body, and his color scheme always includes green and/or purple.

Personality

X4 SigmaGood (stitched)

Sigma as commander of the Maverick Hunters.

Sigma was once the honorable commander of the Maverick Hunters. He was an intelligent leader who easily held the respect of his subordinates. He had a tinge of arrogance, but was ultimately a noble warrior who dutifully protected the humans and his fellow Reploids. However, after being infected by the Maverick Virus, Sigma's flaws were amplified and his moral inhibitions were undone, starting him on the path to become the most infamous Maverick of all time.

Sigma gained an extreme pro-Reploid and anti-human prejudice. He believed that humans only held back the development and evolution of Reploids, and the world would be better off without them.[1] He exhibited traits of savior complex, genuinely believing his crimes were in the best interests of Reploids and that the ends would justify his violent means. His "protection through aggression" philosophy mutated into a Darwinism complex, believing that anything too weak to progress should be eliminated. He did not hesitate to cause global destruction and catastrophe for his goals. He would laugh maniacally and torment his opponents as much as possible. With his electronic brain adapting to the Sigma Virus, Sigma even gained disregard for his own body, acting self-destructively as he could reliably survive any defeat through the virus.

Amidst his madness, Sigma remained a cunning strategist, formulating a variety of plans to conquer the world. He was a masterful manipulator, on more than one occasion turning allies of X and Zero against them. His charisma made him the perfect leader for Maverick rebellions, disguising his insanity and swaying many Hunters to support his cause even without using the Sigma Virus. Still, even he had some reservations, as he noticeably was disgusted with Berkana and the lengths she was willing to go to satisfy her megalomania.

X6 Opening XvsSigma

Sigma's condescending animus with X.

Over the course of the Maverick Wars, Sigma came to respect the rookie Maverick Hunter, X. He claimed that X's devotion to justice is part of what made him begin seeking to change the world in the first place, and he was utterly fascinated by X's powers and his inability to go Maverick.[2] He also held an obsession with Zero, due to him being the original holder of the Maverick Virus and formerly a close ally in the Maverick Hunters. Axl, on the other hand, he saw as little more than a tool in his schemes and an outdated prototype for the superior new generation Reploids.

As Sigma was continually destroyed and resurrected, his sanity began to degrade. The proud warrior fell into a cackling, remorseless psychopath by the Great Repliforce War, and after being resurrected by Gate he was borderline senile. He regained his composure to control Red Alert, and he finally gathered the foresight to pass his revolutionary ideas on to the new generation Reploids, apparently aware that he was coming to the end of the line.

In the remake Maverick Hunter X, Sigma has a more philosophical and level-headed presence. While he retained his distaste for humans and his desire to rule, his fascination with X's potential was much more emphasized, hinging his entire rebellion on the fact that X represents the future of Reploids. It was implied that he was incapable of experiencing true empathy, unlike X,[3] which is part of why he was obsessed with him. His descent into villainy is explored somewhat in the included OVA, The Day of Σ, which shows more of his stoic leadership as a Hunter and his calculating manipulation as a Maverick. He also acted as a manipulative mentor to Vile during Vile Mode, curious to see if he held the same potential as X. While transformed into Wolf Sigma he descends into manic ranting about chaos and destruction being the true nature of reploids.

Abilities

As the former commander of the Maverick Hunters, Sigma is a capable military leader, described as possessing overwhelming combat power and strategic intelligence. His circuitry is the most advanced of its time, which allowed him to maintain a semblance of sanity even while mutating with the Maverick Virus. When he finally gave in and turned Maverick, Sigma remained a charismatic leader. If his wiles are not enough to sway one's mind, he is also able to infect them with the Sigma Virus to force them into madness and loyalty. Due to his affinity with said virus, Sigma's "spirit" can also survive seemingly any physical damage that would be lethal for other Reploids. It is undetectable by conventional scanners, and can only be sensed by Reploids.[4] Its intangibility also allows it to ignore physical assaults and energy attacks, except for those tuned with a Virus Buster or Dr. Doppler's vaccine. His Sigma Virus was only deleted by the Mother Elf.

When not in his viral form, Sigma always has the most physically-advanced and variable Reploid bodies available at the time. He possesses incredible strength and speed, often able to move faster than the Maverick Hunters can follow, and is usually capable of teleportation. In his first body, during a conflict with the Maverick Zero, he was able to effortlessly break through Zero's defenses with a round kick, as well as easily toss him through the ceiling with a single arm. He is also fond of incorporating himself into a variety of battle bodies, each possessing widely different arsenals. He is a capable warrior regardless of whatever weapon he wields, whether it be a beam saber, beam claws, or a shield. In nearly every appearance, Sigma is capable of discharging enormous destructive blasts or waves of power capable of covering entire battle areas, and he is a skilled marksman. As the cause of death and suffering for countless innocent lives, Sigma is one of the most dangerous villains in the classic Mega Man universe.

History

Background

Sigma was created by Dr. Cain as his magnum opus, considered the most advanced Reploid of his time.[5][6] He was put in charge of the Maverick Hunters after their formation, making Sigma the first Reploid to lead worldwide peacekeeping efforts. He specifically commanded the 17th Elite Unit, leading them to victory many times over the years.

Zero&Sigma

Sigma fighting Zero.

One day, the Maverick Hunters received reports of an overwhelmingly powerful "Red Maverick" that had destroyed an entire unit of Hunters. Sigma and his unit tracked the Maverick down to an abandoned laboratory; Sigma chose to confront it alone, so as to not endanger his colleagues. It is here that Sigma encountered Zero, the last product of Dr. Wily. Zero, having suffered a programming flaw from his creation, was an uncontrollable berserker. Sigma was caught off-guard by Zero's strength and suffered heavy damage. Fortunately, Sigma was saved when a 'W' appeared on Zero's forehead, causing him great pain and allowing Sigma to knock him out by punching his head. In the process, however, the Maverick Virus lingering in the laboratory was transferred to Sigma, infecting him.[7]

Following the battle, Sigma ordered the rest of his unit to retrieve Zero's body and contact Dr. Cain for study, limping away. He was later repaired and reassumed control of the Maverick Hunters as usual. However, the Maverick Virus festered in his mind - while Sigma's highly-advanced circuitry kept him sane for a while, his thoughts became more Maverick over time. The Maverick Virus gradually fused with his mind, mutating into an even more dangerous virus called the Sigma Virus which he held complete control over. Without moral inhibitions, Sigma considered the role of Reploids in the world; for example, he noticed the father of all Reploids, X, and his dedication to justice, and began wondering how he himself could change the world.[2] Eventually, Sigma came to the conclusion that humanity was merely holding Reploids back from achieving their true potential, and secretly began organizing an anti-human rebellion.

Mega Man X

Mmxsigma

Sigma

For more details, see Sigma/Mega Man X.
"Excellent job, X! I see why Zero counted on you. You are almost as good a Hunter as I was. But, the time of your destruction has arrived! You shall regret ever having defied me!"
—Sigma

On June 4, 21XX, Sigma finally puts his plans into motion and leads a mass revolt, declaring war on the humans and all Reploids who support them.[8][9] Many Maverick Hunters follow Sigma out of loyalty - others, such as Storm Eagle, by force. This leaves Zero, who by this time has reformed and become a powerful Maverick Hunter, in charge of the organization. X agrees to join Zero in the fight, and X and Zero battle through Sigma's Maverick regime together. It is X who finally confronts Sigma alone in his fortress.

When met with X, Sigma first sends his pet, Velguarder, to test his power. Once it is destroyed, Sigma personally confronts him wielding his beam saber. After his body is destroyed, Sigma's leftover head attaches itself to a giant canine machine called "Wolf Sigma".[10] According to the Rockman X Saikyou Daizokan, Wolf Sigma is an incomplete Reploid unto itself, which Sigma then assumes control over.[11]

After Wolf Sigma's defeat, Sigma laments X's decision for siding with humanity, believing that Reploids would have prospered without humanity holding them back.[1] He then perishes in an explosion along with the rest of his fortress. Although his physical body is scrapped, Sigma's "soul" (the Sigma Virus) survives. After the end credits roll, Sigma's face appears on a blue monitor and warns X that he will return.[12][13]

Mega Man Maverick Hunter X

Sigma's role in the remake Mega Man Maverick Hunter X is relatively unchanged. He is vocal about his desire to unleash X's full potential, believing him to be the future of all Reploids rather than an obstacle.[14] His final battle also has some differences: his head willingly detaches from his body to enter Wolf Sigma, he has no lines during his death nor in the credits, and he falls into the tower below during his death animation. Besides the main game, Sigma also featured heavily in the OVA The Day of Σ.

In Vile Mode, Sigma has already started his rebellion and intends to use Vile as a tool to force X to evolve. Rather than follow Sigma's plans, Vile eliminates the commander's lieutenants, and challenges Sigma. Intrigued by Vile's claim to be the true key to Reploid evolution, Sigma invites Vile to try and reach him with the same methods. However, Vile is unable to get the chance to fight Sigma as he was defeated by X and Zero. Sigma finds Vile's broken body afterwards, and questions him in regards to what his motives were; if he would stand as an enemy or kneel and serve. When Vile admits that he isn't sure himself, an unimpressed Sigma orders his men to extract Vile before departing.

Mega Man X2

MMX2 Neo Sigma

Neo Sigma in Mega Man X2

For more details, see Sigma/Mega Man X2.
See also: Sigma Virus
"Fine. If you will not follow me, then I'll watch you die once again!"
—Sigma

Just as he promised, Sigma secretly returns and reassumes leadership of his Maverick forces thanks to the intervention of the fanatical X-Hunters. He gains a new body with the help of Serges specifically, becoming "Neo Sigma". He also oversees the "Unification" plot, which focuses on capturing and re-assembling the remains of Zero, whom he plans to reprogram as a loyal killing machine.

After Agile's defeat, he cries out for Sigma to avenge him. X then completes the Maverick rematches, prompting Sigma's disembodied voice to challenge him. Sigma finally reveals himself in the Central Computer Stage, alongside Zero. If X successfully collected all of Zero's parts from the X-Hunters, it will be a Fake Zero whom the real Zero easily defeats for him. If not, X will be forced to fight his friend and incapacitate him, bringing him back to his senses. Afterwards, Sigma announces that he "knows Zero's secret", and that he's destined to serve him. He then flees to the depths of the Central Computer, and Zero opens the way for X to follow him for the final battle.

Neo Sigma battles X with arm-mounted claws and electricity attacks similar to Electric Spark, which he claims in the Japanese version were upgrades. After this first body is destroyed, he assumes his true form, that of the Sigma Virus; this marks the first time Sigma's viral form is seen, as the final boss of the game.[15] X defeats the Sigma Virus, causing him to apparently disappear as the Central Computer explodes. Before he disappears, he taunts X that he will return again and cryptically refers to Zero as "the last of the Doctor's creations."

While Neo Sigma is depicted wearing a cape in official art and the opening of the PSX/Saturn version of Mega Man X3, he is never seen wearing it in his in-game sprites.


Mega Man Xtreme

"Bwah ha ha ha. Your efforts are futile... I will never be defeated! As long as Mavericks exist... As long as evil exists in the minds of humans... I'll come back again and again! X, ZERO... I'll pursue you to the end of the world! Bwah ha ha ha! Farewell! FOR NOW!! Bwah ha ha!"
—Sigma

Targeting the Mother Computer of the Maverick Hunter base, Sigma manipulates a young hacker named Techno and coerces the Shadow Hunters into working for him. His new servants hack the Mother Computer, wreaking havoc and forcing X to enter cyberspace to root them out.

Upon the defeat of Techno and the Shadow Hunters, Sigma reveals himself and faces X within cyberspace. Noticeably more confident than previous times, Sigma taunts X after he is beaten the first time and even calls his defeat at the end of Normal Mode merely a retreat. It is only when he is defeated on Hard Mode that he seems to succumb. However, he implies that he will return as long as not only Mavericks exist, but also as long as humanity retains evil minds.


Mega Man X3

Neo 2SigmaX3

Sigma in Mega Man X3

For more details, see Sigma/Mega Man X3.
"We meet again X... It was easy to corrupt that fool, Doppler. And I would have succeeded if you hadn't interfered. But we are always destined to meet, aren't we X? Let the eternal struggle begin!!"
—Sigma

Sigma resumes his threat when he infects the Reploid scientist Dr. Doppler with the Sigma Virus, who had developed a revolutionary anti-virus to repel the Maverick Virus. He uses Doppler to stage a revolt in Dopple Town, converting the utopian city's reformed Mavericks into his new army.[16] In the disc version, a cutscene plays showing Dr. Doppler building Sigma a formidable new body with the latest in Reploid technology.

Once Dr. Doppler is defeated by X, he feels remorse for his Maverick actions and reveals Sigma's lair under Dr. Doppler's Laboratory. Sigma is hunted by X and battles him with a shield and flamethrower, but is defeated. Sigma then emerges in a heavily-armored form, "Kaiser Sigma" (カイザーシグマ Kaizā Shiguma), to fight him again.[17]

Upon this body's destruction, the Sigma Virus itself appears as a wire-frame head and threatens to possess X's body to replace his own. After chasing X through the flaming base, Sigma finally corners him. If Zero did not end up wounded during the game, Zero appears with Doppler's anti-virus on his saber to erase the Sigma Virus for the time being. If Zero did end up wounded, Doppler appears with the anti-virus on his own body and self-destructs to apparently erase the Sigma Virus.


Mega Man Xtreme 2

For more details, see Sigma/Mega Man X2.
"But this time, I have to thank you for doing that. Actually, Berkana went too far. Although, she did help me by keeping me entertained for a while. Hee hee hee."
—Sigma

In Mega Man Xtreme 2, Sigma appears in Extreme Mode after the defeat of Berkana or Gareth (depending on if the player is X or Zero), where it's revealed he had planted the seeds leading to the Erasure incident. In a rare instance, he is pleased that X defeated Berkana, claiming that her greed went much too far.

Sigma's first form is the same as his Neo Sigma body from Mega Man X2, but his second form is "Sigma Beast" (シグマビースト Shiguma Bīsuto), a large Ride Armor.[18] The color of his second form is initially orange, but later alternates between blue and red, which can only be damaged by X while he is blue, and by Zero when red. His weak point is the large lion-like face in his chest.


Mega Man X4

X4Sigma

Sigma in Mega Man X4

For more details, see Sigma/Mega Man X4.
"Repliforce are the fools this time! Now, all that's left is to destroy Earth with the very weapon they made!"
—Sigma

Sigma was thought to be suppressed forever after receiving the anti-virus created by Doppler, but he still manages to return. Assuming a Grim Reaper-like appearance, Sigma meets with General, the leader of the benevolent militia Repliforce. He provokes feelings of doubt and paranoia of the Maverick Hunters within General, revealing that Sigma's latest plan is to conspire against Repliforce and turn it into a rogue enemy of the world.[19]

In the game's inciting incident, Sigma orders Magma Dragoon to bomb the airborne metropolis Sky Lagoon, killing thousands and causing a rift to form between Repliforce and Maverick Hunters. This rift quickly becomes an all-out war as Repliforce refuses to cooperate and even stages a coup d'état to make a new land for Reploids. During the Great Repliforce War, Sigma allows Magma Dragoon to finally get his chance at a fight with X and Zero, and also has Cyber Peacock and Split Mushroom fight them to test their capabilities. He also sends a sleeper agent, Double, into the Maverick Hunters' ranks, meant to strike when the time is right to destroy the 17th Unit and damage X's trust.[20]

With in-fighting between the Maverick Hunters and Repliforce threatening to destroy them both, Sigma increases his influence over General's paranoia. General, formerly an outspoken advocate of Reploid independence, loses all faith in peace and prepares a satellite attack on the humans, which is Sigma's real intention.[21] Fortunately, X or Zero storm the Final Weapon and stop General before he can turn the weapon's sights on Earth - however, the weapon begins to prepare for attack anyways, revealing that someone else is controlling it.

In the end, Sigma is revealed as the true mastermind. In Zero's story, Sigma reveals a portion of Zero's past involving their first encounter. He then battles X or Zero himself, armed with a new body and a scythe with a beam blade. Once this body is destroyed, he attacks again with a collection of several bodies, including Gunner Sigma (シグマガンナー Shiguma Gannā) and Earth Sigma (アースシグマ Āsu Siguma).[22] After this ultimate defeat, Sigma reveals that the Final Weapon is still ready to strike the Earth - fortunately, General sacrifices himself to stop it from firing. Despite this apparent defeat at the Hunters' hands, Sigma still succeeded in part by destroying Repliforce, and by causing X and Zero to begin doubting their own morality.[23]


Mega Man X5

X5Sigma

Psycho Sigma in Mega Man X5

For more details, see Sigma/Mega Man X5 and Sigma Head.
"You'd almost fully evolved to your true self... It's a shame you didn't quite make it, Zero. You had so much potential. Oh well, farewell! Well...it's only you now, X... I will let you live this time. But I won't be so kind next time, and there WILL be a next time! See you soon! You... The strongest Reploid! Bwah ha ha!"
—Sigma

It is some time before Sigma resurfaces again. During his absence, Sigma traces Zero's origins to Dr. Wily and learns of a way to restore him to his original, destructive nature. It is also indicated that Sigma met Dr. Wily in person somehow, though the details are left a mystery.[24] The first part of Sigma's new plot involves hiring the mercenary Dynamo to sabotage the space colony Eurasia with a virus and prepare it to crash into the Earth.

Once Dynamo is in position, Sigma reveals himself to the Maverick Hunters and occupies a giant statue while infecting new Mavericks in the city. He is confronted by one of the Hunters, X or Zero, and injures them, while the other follows to destroy his Sigma Head form.

However, upon Sigma's explosion, the Sigma Virus begins spreading all over the Earth faster than ever. The entire world is thrown into a panic, but to make matters worse, Dynamo sends the Eurasia colony on a collision course with the Earth too. This combination overwhelms the Maverick Hunters, and regardless of their efforts, large pieces of the colony still hit the planet, causing massive damage and revealing a new virus called the Colony Virus. This virus mixes with the Sigma Virus, synthesizing the Zero Virus and summoning a cyberspace area called Zero Space where Sigma hides.

This was Sigma's ultimate goal: to flush Zero's body with a powerful virus to restore him to his original programming, as intended by Wily. Despite the creation of the Zero Virus and the ensuing battle between X and Zero, Sigma ultimately fails in this endeavor, as both X and Zero still manage to defeat him in both of his new bodies, Psycho Sigma (サイコシグマ Saiko Shiguma) and the gargantuan Final Sigma W (ファイナルシグマW Fainaru Shiguma W).[25]

In the aftermath of the battle, the remains of Sigma's head lying nearby suddenly become active and fire an energy laser directly at X and Zero, hitting both of them in the chests. As Zero's body falls from X's grasp, he manages to fire one last blast from his Z-Buster that finishes Sigma. As hypothesized by Alia earlier in the game, Sigma is severely weakened and unable to resurrect himself anymore due to the stress of spreading his Sigma Virus around the globe.[26]

Mega Man X6

X6Sigma

Sigma in Mega Man X6

For more details, see Sigma/Mega Man X6.
"Bha ha ha ha! Not Yet! THE BADDLE HAZ JUSD BEGUNN! DIE! XXX! JUSDIE, X!"
—Sigma

Three weeks pass as the human population moves underground to survive the devastation left by Sigma's last attack. Meanwhile, a renegade Reploid scientist, Gate, plans to use a newfound power known as the Nightmare to rule a world of only the most advanced Reploids. However, as a failsafe he also uncovers Sigma's remains and rebuilds him, keeping him in his Secret Lab as a last resort weapon. Due to the stress of spreading the Sigma Virus, Sigma's programming is still damaged beyond what Gate can repair, and he is reduced to a half-conscious and barely-functioning wreck of his former self. He knows little more than his rage toward X and Zero and speaks in a garbled voice, barely able to form sentences. Additionally, Gate's work on Sigma's new body is unfinished by the time he appears.

Upon Gate's defeat at the hands of the Maverick Hunters, he reluctantly releases Sigma to attack them. However, Sigma refuses to cooperate and needlessly kills Gate before challenging the Hunters to face him deeper within the Secret Lab. They pursue him and he attacks using his incomplete body, but is defeated. After this first form, Sigma emerges as a gigantic unfinished body with a skeletal appearance named Hell Sigma (ヘルシグマ Heru Shiguma), and is again destroyed.


Mega Man X7

SigmaBustMMX7

Head shot of Sigma's first form.

For more details, see Sigma/Mega Man X7.
"That's right, folks! I'll do it again, and AGAIN! I will make X AND Zero MINE! Now, come and get me! Give me a good fight, like you always do!"
—Sigma

After hearing of Red Alert's success in recovering the Virus Program Σ-02 from Cedar and Aluce, Sigma decided to get in contact with the vigilante syndicate for his next plan.[27] Sigma met with Red, this time under the alias of "The Professor", and informed him of his plan to use the mysterious Reploid Axl to copy the DNA programs of X and Zero for immense power boosts. Before putting this plan into motion, he proved his worth to Red by using the DNA Axl took from other Reploids to give power boosts to Red and his colleagues first. Many of the Reploids whom Axl was made to target to make DNA powerups were mostly innocent, irking Axl. This ended up helping him realize something was going on, and it prompted him to seek asylum with the Maverick Hunters.

This forced Sigma to find a way to bring Axl back into Red Alert's service. He secretly infected the eight Red Alert generals, blackmailing Red into following his orders and challenging the Maverick Hunters for custody of Axl. Once all eight of Red Alert's generals were defeated by the Hunters, Red leaked them the location of the Crimson Palace, which they then infiltrated. The Hunters fought Red, but he let himself be destroyed in his base's self-destruction protocol out of grief and shame for his actions, and in order to keep himself from being further manipulated by Sigma.

Afterward, the Hunters continued on to confront Sigma, who was excited to see his old rivals again. After they defeated both of his forms, Sigma reappeared once more (appearing similar to his first form in Mega Man X6) and punched Axl through a wall before vowing to X and Zero that he would again return in a new body. Red, who had presumably died, suddenly reappeared, and Sigma attempted to possess him and regain his strength. However, Red revealed himself to actually be Axl copying Red's form, who then proceeded to blast Sigma out of a window.

Unusually for most games in the X series, Sigma is never identified by name.


Mega Man X8

X8Sigma

Sigma in Mega Man X8

For more details, see Sigma/Mega Man X8.
See also: Copy Sigma
"Your dedication to what you refer to as "justice" is what first got me thinking... I realized the imperfection of this world, and decided I must change it."
—Sigma

Sigma reappears for presumably the last time during the Jakob Project. A new generation of Reploids goes into production, each containing advanced Copy Chips that give them complete immunity to Maverick compromises such as the Sigma Virus. X witnesses this first-hand when an elevator car full of Reploids crashes at the Jakob Orbital Elevator, and he finds the car is full of Reploids who copied Sigma's durable frame to survive the impact. Lumine assures X it is a safe process, but X is still bothered by it.

Soon after the new generation Reploids begin their riot, Alia discovers that their Copy Chips also bear Sigma's program - not just his body's DNA, but his actual program data. This confirms Sigma's involvement in the uprising. It appears the new generation Reploids are well aware of Sigma's influence and entirely willing to work for him; their relationship is like that of a father and his children.

After the Maverick Hunters defeat the eight major new generation Reploids, Sigma personally contacts Hunter Base. He announces that he and his kind are fleeing to space to leave the old world behind, daring the Hunters to pursue him via Jakob. Once the Hunters arrive in Gateway, they confront what appears to be Sigma himself - however, defeating it reveals it was just a Copy Sigma.

Alia locates a Sigma Palace on the surface of the Moon, and the Hunters head there. Once one of them reaches the throne room (the other having been separated by Vile's attack), Sigma welcomes them in an incomplete body; this body is stronger than any of his previous forms, though it has a weak point in the chest.[28] He tells X his unique mind is what first inspired his ambitions, thanks Zero for giving him the Maverick Virus, and calls Axl a worthless prototype. Sigma then strikes, and is able to immobilize the Hunter present as he gloats in victory. However, the other Hunter arrives just in time to save their partner, and the two work together to defeat Sigma. The Maverick explodes, reduced to a pile of rubble.[29]

Suddenly, Lumine appears and congratulates the Hunters for defeating Sigma. He explains that he and the new generation Reploids took advantage of Sigma's ambition to reach outer space, now planning to dispose of older Reploids such as X, Zero, Axl, and even Sigma as well, for they are not needed in the new world. The Hunters fight and defeat Lumine, but during his final moments he makes a startling claim: Sigma was destroyed for good and would never return.

Sigma had expressed an uncharacteristic disbelief after X, Zero, and Axl defeated him on the Moon, crying out in anguish rather than promising to return as usual. This shows he may have been aware it was his final demise; this also explains his insistence on creating a new world for his "children" Mavericks, paving a road for the future knowing that his time was up. It is also speculated that Sigma could no longer regenerate because he was on the Moon with a lack of available bodies to possess, and the vastness of space may have weakened his lingering consciousness to deletion. However, having passed on his data to new generation Reploids who can turn Maverick without remorse, Sigma's dreams of Reploid evolution and supremacy were still primed to carry on into the future.

Post-Mega Man X series

Although Sigma himself never returned in person, his extremist ideas and the Sigma Virus continued to plague the world with Mavericks, until the creation of the Mother Elf from Zero's body. X utilized the Mother Elf to fully neutralize the Sigma Virus, bringing a permanent end to the Maverick Wars that Sigma started. Unfortunately, this series of events would later lead to the far more destructive Elf Wars, due to Dr. Weil's radical agenda to punish the Reploids for the chaos of the Maverick Wars.


Other game appearances

Sigma in Project ✕ Zone 2
  • Sigma makes a cameo on the monitors in the Mega Man X: Command Mission opening cutscene, as part of scenes from the Mega Man X7 ending.
  • Psycho Sigma is a boss in Mega Man X Legacy Collection 2's X Challenge mode, being fought in stage 6-3 alongside Zero Nightmare.
  • In Rockman Xover, Sigma, Dr. Wily, and other villains from other Mega Man series, join forces to wreak havoc. His Mega Man X form is the boss of World 2 and his Mega Man X8 form is the boss of World 7, and he also appeared in several Battle Memories.
  • Sigma's body from Mega Man X4 is one of Chuck Greene's costumes in the Dead Rising 3 DLC mode "Super Ultra Dead Rising 3' Arcade Remix Hyper Edition EX Plus α". He attacks with his scythe and laser eye, and has a special attack called "Sigma Crusher".
  • Sigma's Mega Man X4 body appears in Project ✕ Zone 2 as an enemy unit,
  • Sigma appears as a Spirit in Super Smash Bros. Ultimate with his art from Mega Man Maverick Hunter X. He is an Attack-type Primary Spirit in the "Ace" class. In Adventure Mode, Sigma guards the way to unlocking Mega Man. The playable character representing him is Ganondorf, and the theme music is "X vs. Zero" from Mega Man X5, alluding to how Sigma largely instigated X and Zero's fight in that game.
  • Sigma appeared as a Unit Card and in the illustrations of several Action Cards in TEPPEN.
  • Sigma appeared in Street Fighter × All Capcom.

Yamato Man's spear tip
PLEASE NOTE: THE FOLLOWING INFORMATION IS ABOUT MATERIAL THAT HAS NOT BEEN LOCALIZED OR DUBBED OUTSIDE OF JAPAN OR OTHER ASIAN COUNTRIES, AND USES THE ORIGINAL TERMS AND NAMES.
Yamato Man

  • Sigma appeared as an event character in the Japanese version of Zombie Cafe.
  • Neo Sigma appeared as an event character in Dragon Poker.
  • Sigma appeared as an event character in Elemental Story.
  • Sigma appeared as an event character in Tower of Saviors.
  • In the Rockman X DiVE event from the Taiwanese version of Shironeko Project, a Sigma Virus left the Rockman X DiVE cyberworld and entered the Shironeko world, mutating into Sikuma (romanized as SIGUMA and SIKUMA in the game). He is the final boss from the event story, and the event's co-op boss, being fought in a form similar to the Sigma Head from Mega Man X5.

Yamato Man
END OF UNLOCALIZED MATERIAL.

Mega Man X DiVE

Sigma is present in various forms in Mega Man X DiVE, both as playable Hunter Programs and as bosses. In the game's story, Sigma often appears as a vessel of the Sigma Virus, but near the end of of the game he also appears in his pre-Maverick form as an ally to the Player.

Hunter Programs

  • Sigma's first form from Mega Man X is an S rank Hunter Program. His Active Skills are Blade Dash and Head Beams.
  • Sigma (X4 2nd form), based on his reaper-like appearance in Mega Man X4, is a DiVE Festival-exclusive Hunter Program. His Active Skills are Scythe Throw and Laser Eye.
  • Sigma in a formal devil-like outfit, known as Halloween Sigma, is a seasonal Hunter Program. His Active Skills are Penta Bat Shot and Hellfire Dust. Despite his appearance, this form has the personality and memories of his time as a Maverick Hunter, and is very generous, hiding several treats during Halloween for others to find.
  • Sigma in a banchō (Japanese delinquent commander) outfit, known as Gangsta Boy Sigma, is a Festival-exclusive Hunter Program. Similar to his Halloween version, Gangsta Boy Sigma has a personality similar to the time before he fought Zero, always protecting his surbodinates and keeping the mood positive. However, he does not like negligence to training, believing that a Hunter should always aim to the top, setting himself as an example of the top his surbodinates should aim to achieve.[30] His Active Skills are Duel Invitation and Lethal Combo.

Bosses

  • Sigma's first form from Mega Man X appeared as a boss in the Story stages 19-6 and 20-5. He fights with his usual attack pattern, but also additional attacks including his 5 Bullet Shot and Electromagnetic Wave from Mega Man X2, and his Rapid-Fire Flame Shot from Mega Man X3.
  • Wolf Sigma, Sigma (X4 1st form), Sigma (X4 3rd form), Final Sigma W, Sigma Virus, Hell Sigma, and Sigma (X3 1st form), all appeared as the bosses of Raid Boss and Guild Boss events.
    • Sigma Virus also appeared in the story stage 20-4, and Sigma's final forms from Mega Man X4 to X6appeared in other event stages as a manifestation of the Sigma Virus that was inside Droitclair, Angepitoyeir, and Eratoeir.
  • Wolf Sigma's data was mixed with the data from a Magnamalo in the Monster Hunter Rise collab event "Mission Code: R・I・S・E", appearing as a boss called Magnamalo Sigma.
  • The third Halloween event stage had a modified version of Sigma (X4 1st form) named Flame Demon Sigma.

Marvel vs. Capcom: Infinite

Sigma appears as one of the main antagonists of the story mode in Marvel vs. Capcom: Infinite, forming a villainous alliance with Marvel Comics' Ultron. He was later added to the game as a playable DLC character.

Other media

Mega Man (Ruby-Spears)

Cartoonsigma2

Sigma in the Mega Man cartoon show.

Sigma is referred to in the episode Mega X of the Ruby-Spears Mega Man animated series, where X, Vile and Spark Mandrill go back in time. Vile and Spark Mandrill's goal was to obtain lightanium, a material worth a fortune in the future, in order to fund Sigma's rebellion. His profile, shown by X, shows him in his first body and mistakenly spells his name as Cigma. The only line Sigma has is when Vile contacts him near the end of the episode — a short praise: "Well done, Vile."

Mega Man (Archie Comics)

Main article: Sigma/Archie Comics

Sigma is the main antagonist from the Mega Man X era and the Worlds Unite crossover.

Rockman X (manga)

In the Rockman X manga, Sigma started his rebellion against humans by killing a Maverick Hunter, Kyle, who protested against him. Sigma then convinced various Hunters to join him by declaring that Reploids are superior to humans and they should no longer obey them. When Spark Mandrill surrendered to X and was about to leak Sigma's plans, Sigma used a giant hologram of himself (via a flying mechanism) to kill Mandrill and taunt X. Before the fight with Armored Armadillo, it was shown that Sigma scarred Armadillo's left eye because he didn't follow his orders to attack X in the forest. Once the eight Mavericks were all destroyed, Sigma challenged X to face him in his space fortress. Sigma was defeated by X in the ensuing battle, but Sigma then used his giant Wolf Sigma body to overpower him. This forced X to crash the entire fortress to defeat Wolf Sigma.

In Rockman X2, Sigma was shown to have survived the crash, staying in hiding while working on a more powerful body. He and the X-Hunters initiated a plan to corrupt good Reploids and force them to go Maverick. Still, after the defeat of eight Mavericks and the X-Hunters, Sigma was defeated by X and Zero working together.

In Rockman X3, Sigma took control of Dr. Doppler to start another Maverick uprising, using him to infect Reploids with "Worms" and create a super powerful body by analyzing X. After Doppler's defeat, Sigma had a fierce battle against X, but was eventually defeated using the Z-Saber. He then revealed a more powerful body, Kaiser Sigma, and completely destroyed X with it. To Sigma's surprise, X regenerated and with golden armor, using this new power to destroy Sigma with a punch. Sigma also appeared disguised as an angel when a worm infected X, telling him he couldn't enter paradise due to his "sins" in an attempt to cast doubt, although X eventually saw through the illusion and shot Sigma.

Sigma only had a cameo appearance in the Rockman X4 manga, being mentioned by Double in the last chapter where the traitor made clear Sigma was the true instigator of the Great Repliforce War.

Irregular Hunter Rockman X

Sigma appears as the leader of the Maverick Hunters. When Storm Eagle challenges X to a fight, Sigma appears and stops Storm Eagle without destroying him, giving him a lecture and the Storm Tornado to X. However, when Zero starts acting strangely, Sigma tells Armored Armadillo that Zero became a Maverick and orders him to destroy Zero. Later, Vile escapes from his cell and takes four Hunters to work for him. After the defeat of the four Hunters, Sigma orders X to go after Zero and destroy him, but Zero reveals Sigma's involvement in the events, and they are attacked by Vile, Storm Eagle, Armored Armadillo, and Boomer Kuwanger. After the defeat of the latter three, Vile escapes and Sigma decides to destroy the base of the Maverick Hunters. After talking with A-1, X and Zero go after Sigma, who started attacking the city with several Mechaniloids. Sigma appears to face the two Hunters, but after being hit by two charge shots at the same time, He calls Vile and shows that they took A-1 as hostage, taking advantage over X. Unable to see X taking so many hits, A-1 releases himself and runs to Sigma, self-destructing near him. Sigma is stunned by the explosion, and X, angry and sad for A-1, fires a large charge shot, and Zero also fires one at the same time, but Vile saves Sigma and they escape. While leaving, Sigma tells them that he will surely conquer the world.

Rockman X The Novel: Irregulars Report

X8NavigatorAlertIconEdit This section requires expansion.

Sigma was created by Dr. Cain as his masterpiece. However, upon investigating the ruins where he fought against a Maverick Zero, he discovered the truth about X and the Reploids and was filled with hatred for being simply a copy of X, which led to his plan to rebel against humanity and test X's abilities.

Gallery

Main article: Sigma/Gallery

Videos

See also

Trivia

EarlyXHunterConcept

Early designs that served as the basis for Sigma, and later the X-Hunters.

  • Sigma was designed by merging three early villain designs created by Inafune during the early development of the first Mega Man X game. The same designs were later used as the basis for the X-Hunters in Mega Man X2.[31]
    • Sigma's face has a close similarity to both M. Bison and Sagat, two major villains of the Street Fighter series. He also resembles Braiking Boss, the villain of Casshern. Due to this, some fans believe that Sigma was based on one of them.[32] The resemblance to M. Bison is even referenced in Project X Zone 2.
    • During a 2008 Q&A session, when asked if Sagat served as inspiration for Sigma, Keiji Inafune stated that Sigma (and Zero) represent the idea that nothing is absolute.[33]
  • Sigma (Σ) is the 18th letter of the Greek alphabet and is used in mathematics to denote series, finite, or infinite sums of variables. The Σ symbol is often seen on Mavericks from Sigma's army. Interestingly, the sigma (Σ) letter was originated from the Phoenician letter sheen (W), which is similar to the English letter "W".
    • Commentary by Keiji Inafune on concept art for Sigma made it clear that Sigma's connection to Dr. Wily was intended from the start.[34]
  • The penultimate cutscene of Zero's story in Mega Man X4 reveals Sigma's pre-Maverick design, which lacked his facial scars and the spikes on his wrists and knees featured on his original design. This design would be maintained for his pre-Maverick appearance in Maverick Hunter X, with redesigned wrist guards. The single-frame flashback of this battle from Mega Man X5, however, discards the redesign, instead using the standard Maverick Sigma design without facial scars.
  • There are multiple interpretations of the way Sigma received his trademark eye scars:
  1. In Mega Man X4, the Maverick Zero inflicted damage on Sigma's face resembling his future scars. However, the short film The Day of Σ featured in Mega Man Maverick Hunter X and Mega Man X Legacy Collection shows X inflicting scars upon his face at the start of his rebellion. (Though this is likely a retcon, it is theoretically possible that scars inflicted by Zero were repaired, only for new scars to be later inflicted by X).
    • Given that Sigma's subsequent bodies always feature facial scars even after prior bodies being destroyed, this implies that Sigma adopted their appearance for cosmetic reasons.
  2. In Mega Man Maverick Hunter X's OVA, The Day of Σ, X scarred Sigma's face with his bare hand during their first confrontation. Later as Wolf Sigma, Sigma's damaged face ironically resembles the wounds he received from Maverick Zero in Mega Man X4.
  3. In the Rockman X manga, Sigma scarred himself as a mark of going Maverick, using the heat of his fingertip guns after shooting Kyle.
  4. In Rockman X The Novel: Irregulars Report, Sigma's scars were also implied to be self-inflicted. While communicating with Zero, Sigma is seen putting his right hand near his eyes, with his fingers having traces of Reploid blood on them.
  • Mega Man X and Mega Man X3 are the only games to have official artwork for Sigma's final boss forms in their respective games.
  • If Sigma's name is entered as the player's name in Mega Man 9, the game erroneously says that it is "inappropriate language", and changes it to "Si**a".
  • Sigma was set to appear in the cancelled game Rockman Online.
  • Sigma was set to appear as a playable character in the cancelled game Capcom Super League Online.
  • Although Sigma is never seen in the Mega Man Zero series, the Sigma Virus is mentioned in Mega Man Zero 2 and Mega Man Zero 3, and in the first game his symbol is visible (though difficult to spot in the background) in the left of the chamber where Zero was resting. Sigma also makes a cameo in the Rockman Zero manga.

References

  1. 1.0 1.1 Sigma: Why, X?! Why have you done this to us?! Without the humans, my Reploid brothers could have ushered in a new age.....
  2. 2.0 2.1 Sigma: Your dedication to what you refer to as "justice" is what first got me thinking... I realized the imperfection of this world and decided I must change it. - Mega Man X8.
  3. Mega Man Maverick Hunter X, Capcom (2006)
    The Day of Σ Scene 2 Hunter Base
    Sigma: As far as [Mega Man X's] judgement and abilities on the battlefield is concerned, he has shown tremendous promise. However, he tends to hesitate when the situation calls for decisive action. // Dr. Cain: He worries too much. Course, that is his greatest feature. And the source of his potential. Sigma, you don't have that problem at all.
  4. Zero: ...I'm okay. Just a bit of a bruised ego. Anyway, where is Sigma?! X: He took off. Alia is looking for him now, but she can't pick up any readings. Zero: He is a virus... ... he can't be seen or analyzed correctly like other data. You have to feel his evil energy. That's the only way to find him.
  5. Compendium of Rockman X page 15
  6. Rockman X Chouhyakka page 46
  7. Story summary from Rockman Zero Collection official site. (Translation in The Mega Man Network)
  8. "The Journal of Dr. Cain", Mega Man X instruction manual, 1993. Page 10.
  9. It was originally listed in the Japanese version as July 4th. It was changed to June 4th overseas, most likely because the date fell on the real world American holiday Independence Day.
  10. R20 Rockman & Rockman X Official Complete Works, page 125.
  11. "A yet incomplete extra large wolf type repliroid. Sigma's head takes over the functions of the brain, but because of its excessive size, the feet and arms require more development time to be completed. Once the super-powered repliroid is completed, Sigma will be unstoppable in his plan for world domination!" - Rockman X Saikyou Daikozan
  12. Sigma: "YOU HAVE WON A TEMPORARY VICTORY, X! WHAT YOU DESTROYED WAS ONLY A TEMPORARY BODY -- MY SPIRIT REMAINS INTACT. IN TIME I WILL FIND BODIES STRONG ENOUGH TO DO MY BIDDING AND I WILL RETURN. I WILL SEE YOU SOON, X. VERY SOON..." --Mega Man X game, 1993 (US)
  13. 「おまえがたおしたものは、わたし じしんではない。バラバラになったキカイは、わたしの ぶんしんのようなもの。わたしはふたたび、じったいとなってよみがえる・・・ エックスよ、また あえるひをたのしみに しているぞ。ハハハハハ・・・」 Translation: "What you've destroyed, is not my true self. The scattered machine, is something like my avatar. I will become substantial once again... X, I am looking forward to seeing again. Ha ha ha ha ha ..." --Rockman X game, 1993 (Japan)
  14. Sigma: Magnificent, X! And to think you've been classified as a "B-class" hunter! Ha ha ha ha!
    X: Sigma! Your Maverick plans stop RIGHT HERE!
    Sigma: Mwah ha ha! Hah ha ha ha ha ha!
  15. Mega Man Homepage - Mega Man X2: Bosses. Retrieved on 2007-8-6.
  16. Mega Man Homepage - Mega Man X3: Characters. Retrieved on 2007-8-6.
  17. Mega Man X3 ending.
  18. Compendium of Rockman X page 137
  19. Sigma: Hee hee hee. My plan to keep Repliforce and the Maverick Hunters at each others' throats worked perfectly! --Mega Man X4 1997 (US)
  20. Mega Man X4
    (Something beeps from within Double, and he presses on a panel on his chest. A mysterious voice is then heard.) // Mysterious Voice (Sigma): It's me! Those hunters must not be allowed in here! Terminate them!! // Double: Roger... (turns back to the Hunters)
  21. General: ...We're going to build a nation for the Reploids. That's our ultimate goal. We'll fight anyone who tries to interfere with our independence. --Mega Man X4 1997 (US)
  22. Mega Man X Legacy Collection
  23. Mega Man Homepage - Mega Man X4: Characters. Retrieved on 2007-8-6.
  24. Sigma: "Heheheh, don’t get too worked up…I’m close…hey, Zero…so I met this old man…and that old man told me that you were the world’s strongest…who is that old man?" - Final Sigma W with Zero, Mega Man X5
  25. Mega Man X Legacy Collection 2 Hunter Medals and X Challenge
  26. Alia: "Since Sigma scattered a large amount of the Virus, he doesn't have any energy left to reproduce himself..." - After defeating Dark Necrobat, Mega Man X5
  27. Rockman X7 Original Soundtrack booklet
  28. Rockman X8 Hisshou Kouryakuhou - pp. 117-119
  29. Sigma Palace, Mega Man X8. (Normal or Hard Mode).
  30. Rockman X DiVE official Twitter
  31. Mega Man X Official Complete Works, UDON Entertainment Corp. 2009. pg.93. Retrieved on April 8, 2011.
  32. The Reploid Research Lavatory: A Day For Sigma
  33. "Some people think he might have been inspired by Sagat from Street Fighter because of his look, but that's not actually the case. Sigma and Zero basically represent the idea that nothing is absolute. Sigma was a powerful leader of the Maverick Hunters but after Zero passed the virus to him, his allegiance changed. Circumstances can change anything, and nothing is absolute." --Keiji Inafune, 2008. Capcom-unity - Inafune-san Answers Your Questions!
  34. "The connection with Wily had always been part of the plan." - Sigma concept art, Keiji Inafune, Mega Man X Complete Works