What begins as a friendly competition between Sonic and Knuckles quickly becomes intense as other rivals step in to take on Sonic.

In head-to-head races, Sonic and his opponent trip, push and jump over each other using boost moves and power-ups as they hurtle towards the finish line at breakneck speeds.



Characteristics:

- Compete with each of Sonic's rivals and you'll feel like you're playing against a real opponent!
- Players will negotiate wildly twisty 3D tracks and narrowly avoid dangerous traps while fending off the insidious Dr. Eggman and his myriad inventions.
- Whether you're playing alone or against a friend, it's always a two-player experience, with new and innovative game mechanics supporting the lively race!
- Unique head-to-head racing experience!
- Built specifically for PSP! Sonic-style 2D gameplay in 3D environments maximizes the PSP's technical strengths.
- Four characters and four unique stories allow for a different gameplay experience every time you play.
- Change your character's appearance using reward card collection systems.
- Trading cards can be exchanged with friends via WiFi connectivity.