Most X-Men characters in a single game

The X-Men game featuring the most characters taken from the pages of the Marvel comic books is X-Men Legends II: Rise of Apocalypse. The PS2 and Xbox versions of this epic action RPG feature 42 official X-Men characters, including 15 playable heroes, four unlockable secret characters and 23 villains. Guinness World Records Gamers’ Edition 2009.