Marvel vs. Capcom: Clash of Super Heroes
Marvel vs. Capcom: Clash of Super Heroes is Capcom's fifth fighting game licensed from Marvel Comics and the third game in the Marvel vs. Capcom series. Unlike X-Men vs. Street Fighter and Marvel Super Heroes vs. Street Fighter, the game features not only Street Fighter characters, but also characters from numerous Capcom franchises such as Mega Man and Strider. The game is set in the continuity of the Marvel comics, in which Professor Charles Xavier asks the heroes to stop him before he merges with Magneto's consciousness and becomes the being known as Onslaught, the final boss.
Story
The plot is loosely based on the X-Men: Onslaught storyline from the Marvel Comics continuity: after an incident in which mutant telepath Charles Xavier was forced to enter the mind of Magneto, part of Magneto's rage slipped into Xavier's psyche and, after mixing with Xavier's darkest emotions, spawned a powerful psychic entity known as Onslaught. In the game, the story expands as Xavier's conscience summons heroes from the Capcom universe to stop him.