What starts as a friendly competition between Sonic and Knuckles quickly gets intense as other rivals jump in to take on Sonic. In heated head-to-head races, Sonic and his opponent trip, shove, and vault over each other using boost moves and power ups while hurtling toward the finish line at breakneck speeds. Players will negotiate wildly twisting 3D tracks and narrowly avoid hazardous traps while watching out for the insidious Dr. Eggman and his myriad of contraptions. Whether playing alone or against a friend, it's always a two-player experience with new, innovative gameplay mechanics supporting the high-spirited race!

Features:

* Unique head-to-head racing experience!
o Single Player Mode will feel just as competitive as if you are playing against an actual player.
o Multiplayer Mode pits players against friends via WiFi.
* Custom built for the PSP! Sonic-style 2D gameplay in 3D environments maximizes the technical strengths of the PSP.
* Four characters and four unique storylines allow for a different game experience every time you play.
* Change your character's looks utilizing the card-reward collecting systems.
* Trading cards can be exchanged with friends via WiFi connectivity.