Building upon the success of Sonic Rivals, 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.