Motor Mayhem Cheats
Code: Hold L1 + R1 + L2 + R2 and quickly press Left, Right(2), Circle, Square
Code: Hold L1 and press X(2), Square
Unlock City Canal level
After finishing the Deathmatch level under the normal difficulty to unlock the City Canal level in multi-player and quick battle modes.
Unlock Downtown level
After finishing the Eliminator levels under the normal difficulty to unlock the Downtown level in multi-player and quick battle modes.
Choose hard or very hard difficulty. If you win the Eliminator, Deathmatch, and Endurance ranks with the same character you will unlock Buzzsaw.
Unlock Santa hats
If you set the system date anywhere from December 21 through December 25 you will have santa hats.