Hold L1 then press Up, Square, Left, Circle, X, Square, Triangle, Right
4th From the Sun
Hold R1 and press square, triangle, square, triangle
Alternate John Andretti car
Hold L2 then press Square, Circle, Triangle, X
Asher Boldt's EA Sports car
Hold L1 and press Square, Triangle, Square, Circle, Square, X
Jocko Michaels EA.Com Car
Hold R1 and press Circle, Circle, Circle
One-on-One Mode
Hold R1 and press Left, Circle, Up, Down, Right, Right, Right
Proving Grounds Track
Hold L2 and press Square, Circle, Square, Up, Up, Down, Up, Left, Right, X
Treasure Island Track
Hold L2 and press square, circle, X, Down, Up, Right Left
Unlock KC Monoxide
Hold R2 and press square, circle, X, Up, Down, Left, Right
Unlock Shorty Lueng
Hold L2 then press Circle, Triangle, Triangle, Triangle, Triangle, Triangle, X
Whenever you hit another driver from behind it'll help move them out of the way