The story takes place on various islands, where Dr. Eggman has created chaos machines that are destroying the environment and causing destruction. Sonic must navigate through these islands, fighting against Dr. Eggman's robots and collecting Chaos Emeralds to save the world.
The gameplay of Sonic Chaos is fast-paced and action-packed, with an emphasis on platforming and combat. Players control Sonic as he runs, jumps, and spins his way through levels, fighting against enemies and bosses along the way. The game features a variety of power-ups, including the Super Peel-Out which allows Sonic to move at high speeds.