Space Theater is the third Survival Stage from Sonic Riders.
It is a huge floating square space platform surrounded with green laser fences. It is perhaps the most difficult Survival Stage in the game. Over the entire course are UFOs that either occasionally malfunction and fall or take pieces of the surface, thus changing the course. Unlike the other two survival courses in which the player must attack the other players until they lose all their lives, the only way to defeat the other players is to hit them into the green laser fences until they lose all their lives.