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®(PlayStation®Portable) system's Wi-Fi function.

• Battle Mode: Players will select from six ways to thrash their rival buddies: Knockout, Ring Battle, Race, King of the Hill, Capture the Chao, and Tag.
• Single Disc Game Sharing: Two players will easily access the Multiplayer challenge with just a single disc using the Wi-Fi function.
• Intriguing New Storyline. The Chao seem to be disappearing and all eight rivals must work fast to find out who is behind it.
• Three New Playable Characters: Miles "Tails" Prower, Espio the Chameleon, and Rouge the Bat round out the cast of eight rivals.
• Free Play Mode: Free from rivalry, the player can experience the challenging old-school Sonic-style map at their own pace!
• Expanded Card Collection: Players can now collect 150 new cards for loads of new options to customize their playable characters.