Mega Man X: The Day of Sigma
イレギュラーハンターＸ：The day of Σ
Mega Man X: The Day of Sigma Online is Free. Acting as a prequel to Mega Man Maverick Hunter X, it follows Maverick Hunters led by Sigma to face a giant, rebellious mechalonoid. With X unwilling to hurt a hostage, Sigma takes the enemy on and berates X. Sigma later discusses X's potential for free will with Dr. Cain, something Sigma does not see power in. Meanwhile, X and Zero become suspicious about several maverick incidents occurring at the same time. It is revealed Sigma has hacked a massive maverick to distract the hunters as he frees several others including Vile. After disabling Zero, Sigma forces X to remove his weaponry and destroys Abel City, killing Dr. Cain in the process. X then remembers his early days in which Light, who was dying, told X how he gave him the power to develop his own mind and that he entrusts X to use power. X fights back, but only damages Sigma's head. Satisfied with this development, Sigma escapes to start his rebellion, leading to the game's beginning.
- Genre: Animation, Action, Science Fiction
- Country: Japan
- Director: Atsushi Otsuki
- Cast: Takahiro Sakurai, Ryotaro Okiayu, Mugihito, Tomohisa Aso, Tadashi Miyazawa, Ryuzou Ishino, Daisuke Kageura, Hiroshi Shimozaki, Daisuke Egawa, Nobuyuki Kobushi, Yumiko Kobayashi, Eriko Kigawa, Yoshiaki Matsumoto, Hiroto Kazuki,
