The sequel to Sonic?s fast and furious 3D action platformer, has several new features to enhance the player?s experience. A revamped rival ?jostling? gameplay system allows for closer head-to-head competition, whilst rivalry is further improved with upgraded power-ups and range weapons allowing players to attack or defend themselves regardless of their position. A brand new Battle mode allows two players to jump into six different multiplayer challenges by sharing just one disc using the PSP system?s Wi-Fi function.