Space Theater is one of three "Battle Stages" in Sonic Riders. With no bearing on the game's Story or Mission modes, the Battle Stages are multiplayer arenas where the Extreme Gear riders must launch attacks at each other, with the aim of being the last one still standing after all rivals are eliminated.

Unlike Dual Towers and Snow Valley, in Space Theater the arena itself can be more dangerous to survival than the other characters are. Crackling electric fences placed seemingly at random around the course can zap down your hit total, as will falling over the edge (something not possible in the other Battle Stages).

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