Various Cheats
Enter the following codes quickly at the Main Menu. You'll hear a sound to confirm. Then the corresponding code will be unlocked on the cheats screen.

Invincibility
Quickly press L2(2), R2(2), L2, R2, L2, L1, R2, R1, L2, L1(2).

Immunity from police
Quickly press L1, L2, R1(4), L2(2), R1(2), L1(2), R2.

Rear wheel steering
Quickly press R1(3), R2, L2, R1, R2, L2, L1, R2, R1, L2, L1.

Mini cars
Quickly press R1, R2, R1, R2, L1, L2, R1, R2, L1, R1, L2(3).
Note: The collision detection will still behave as if the cars were normal size.

Stilts
Quickly press R2, L2, R1, R2, L2, L1, R2(2), L2(2), L1, R2, R1 to unlock an option that will allow for a higher suspension.

Upside-down screen
Quickly press R2(2), R1, L2, L1, R2, L2, L1, R2(2), L2, R2, L1 to unlock the "Antipodean" option on the cheats screen.

View credits
Quickly press L1, L2, R1, R2, L1, R1, R2, L2, R1, R2, L1, L2, R1.

Tips

Cheats