A group of humanoids known as the Sentinels plan to rid the world of mutants. The X-Men must ally with their greatest enemies in order to save their teammate - Forge. The mutants must save Forge before the Sentinels can coax secrets from him that are capable of destroying all mutant-kind.
X-Men: Next Dimension is a fighting game where players can choose between up to twenty-four available characters. The game features an extensive combo system, including normal chains, air juggles, and air launchers. Characters also have various counter-attacks available, specific to the type of attack they are countering. In addition to standard attacks, players can execute super attacks by pressing two punch or kick buttons simultaneously. These include blasts or beams, some of which can stun an opponent, as well as physical attacks that have special effects. There are several different types of super attacks, each having four different levels of power. The stages are rendered in 3D; unlike in most fighting games, many stages consist of multiple screens. The player can choose to move between these screens; kicking the opponent out of the current screen also leads to a location change.
Most versions include modes such as Story Mode , where the player follows a scripted mode with limited character control. There is also Arcade Mode , a one-player mode against AI in ten matches, and Versus Mode for two-player combat. The Survival Mode tests skills against an endless series of enemies. The Xbox version has an extra stage and the ability to play as Pyro. The GameCube version features two exclusive modes: Team Mode and Practice Mode .