The story of Mayhem 3D revolves around a group of friends who get caught up in an intergalactic racing tournament. The players take on the role of one of these characters, competing against otherworldly opponents in high-speed racing events.
The gameplay of Mayhem 3D features fast-paced racing action, with players controlling their chosen character's vehicle as they navigate treacherous tracks and obstacles. With a variety of power-ups and upgrades available, players can enhance their cars' performance to gain an edge over their opponents.