Select Credits at the options menu. Select development, then after the FMV, enter the codes.
John Andretti's 2nd car | Hold R1 then press Square, Triangle, Square, Triangle |
Proving Grounds track | Hold R1 then press Left, Circle, Up, Down, Right, Right, Right |
Treasure Island track | Hold L2 and press Square, Circle, Square, Up, Up, Down, Up, Left, Right, X. |
KC Monoxide | Hold L2 and press Square, Circle, X, Down, Up, Right, Left |
Unlock "Shorty" Leung | Hold R2 and press Square, Circle, X, Up, Down, Left, Right |
Unlock Jocko Michaels | Hold L1 and press Square, Triangle, Square, Circle, Square, X |
Unlock Asher Boldt | Hold L2 and press Square, Circle, Triangle, X |
at CheatingDome.com.