Released in 2000 for the Game Boy Color, X-Men: Mutant Wars is a side-scrolling beat 'em-up game and the second X-Men title for the system. Its launch was synchronized with the release of the X-Men film on DVD.

The game's narrative revolves around a menace posed by cyborgs terrorising the planet. Convinced that Magneto is behind the cyborgs' actions, the X-Men are tasked with defeating him. Players can control characters like Wolverine, Storm, Cyclops, Iceman, and Gambit as they gear up for the impending battle to save the planet.