X6-SIGMA_1st.ogg (Ogg Vorbis sound file, length 2m 22s, 320kbps)
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Secret Lab (秘密研究所 Himitsu Kenkyūsho) is the hideout of Gate. It serves as the final stages for...
Sigma (シグマ Shiguma), formerly referred to as "Commander Sigma", is the main antagonist of the...