Sonic Rivals is a racing video game, part of the Sonic the Hedgehog series that was released in late 2006. It is the first Sonic game developed by Backbone Entertainment, for the PlayStation Portable. The game was also supervised by members of Sega Studio USA including Takashi Iizuka. Wikipedia
Initial release date: 16 November 2006
Series: Sonic the Hedgehog
Developers: Backbone Entertainment, Sonic Team, Sega Studio USA
Platform: PlayStation Portable
Designers: Takashi Iizuka, Sonic Team
Modes: Single-player video game, Multiplayer video game
You will be racing with other crazy characters in the sonic universe of insane action, moving from one level to another by avoiding obstacles on your way to get free power-ups.