The game is loosely based on the Infinity Gauntlet storyline, with the heroes and villains battling each other for the Infinity Gems. The final boss is Thanos, who steals whatever Gems the player had collected (at that point, all but the sixth gem, Mind) and uses them against the player, but with each gem having a strange, new effect when used by Thanos.
The game played similar to a previous fighting game, X-Men: Children of the Atom, but with a more simplified use of the super meter, and the addition of the Infinity Gems. Each Gem could be activated in battle, giving the user a different power for a few seconds. In addition, each character had a Gem that they had a special affinity for, and would get additional abilities whenever they activated it.
Cons: The obvious inclusion of the MvC hyper portraits. No gems whatsoever. Issues with sound (the voices are poor rips) and some colour problems (some moves flash your colour back to the original green pallete).
Moves have Gamma lift missing. Gamma Crush asteroid hyper now activated by d,db,b and punches. Addition of a Hyper Gamma Slam. Has a Zangief helper.