The game includes eight unique areas, each with two track variants, for a total of 16 tracks. Only five tracks are accessible from the start; the remainder are unlocked through progression in the game's story mode and by winning Gold in both the World Grand Prix tournaments, in which players race through five consecutive tracks and attempt to get the highest overall score. The game's Story Mode is divided into two campaigns, whose events intersect with one another: The "Heroes" story, focusing on Sonic, Tails, and Knuckles; and the "Babylon" story, focusing on the Babylon Rogues, consisting of new characters Jet the Hawk, Wave the Swallow, and Storm the Albatross. In each campaign, players take part in consecutive races with predetermined characters, and must take first place in each race to continue the story. Completing the Heroes campaign unlocks the Babylon campaign, which includes an epilogue in which the two stories converge. Up to four players can also compete in the game's single race and battle modes.