Note: A European save file will not work with a North American copy of the game and vice-versa.
The PSP version of Cars 2 challenges players to complete various C.H.R.O.M.E. missions to unlock the full roster of over 20 characters and numerous international racing circuits. While playing through the campaign is fun, many players prefer having a "100% Complete" profile to: cars+2+psp+save+data+free