The gloves are off and Sonic and his rivals are gearing up for an intense new head-to-head competition exclusively on the PSP (PlayStation Portable) system. This sequel to Sonic's 2D action platformer features all-new "jostling" controls for tighter competition and a brand new Battle mode that allows two players to jump into six different Multiplayer challenges by sharing one disc. With three new characters, 12 new stages and upgraded signature moves for each character, the enhanced Rivals experience will bring a whole new level of handheld fun to the PSP system.