Mega Man 2.5D is an unofficial fan-made game created by Peter Sjöstrand and Edgar Cebolledo.
The project began in 2009 as an animated mockup. Due to the positive response to it, development began on an actual playable version. The main aspect that sets the game apart from other Mega Man games is the Co-op Mode, which has two players fight side by side in order to get through the game. Another thing that's different in Mega Man 2.5D is the use of changing camera perspectives, which is featured heavily in the single-player mode of the game. Because of these game mechanics, Mega Man 2.5D features separate level designs for its co-op and single-player modes.
The idea is to have Mega Man 2.5D be a "greatest hits" type game that brings back stages and bosses from various Mega Man games, while at the same time putting a new spin on them.
One day, while Mega Man was out patrolling the city, Dr. Wily suddenly attacked the lab. Mega Man hurried back to the lab with Proto Man, only to find Dr. Light had been kidnapped and Wily had sent eight Robot Masters to attack in the meantime. Mega Man and Proto Man head out to defeat the Robot Masters.
After the Robot Masters are defeated, the two head off to confront Wily in his latest Wily Castle. After defeating the Wily Machine and saving Dr. Light, the fortress begins to self-destruct. Dr. Light escapes while Mega Man and Proto Man chase down the escaping Wily. The two defeat his Wily Capsule, capture Dr. Wily and send him to jail.
- Mega Man: The Light family enjoys a picnic together.
- Proto Man: Proto Man watches over the city at night.
- Roll: Roll and Eddie watch Mega Man clean up the lab.
- Dr. Light: Dr. Light works on his newest project.
- Bass: Bass battles against Metal Man, Concrete Man and Cut Man.
The following Robot Masters appear in Mega Man 2.5D:
- Shadow Man (Mega Man 3)
- Pharaoh Man (Mega Man 4)
- Snake Man (Mega Man 3)
- Quick Man (Mega Man 2)
- Tornado Man (Mega Man 9)
- Time Man (Mega Man: Powered Up)
- Splash Woman (Mega Man 9)
- Star Man (Mega Man 5)