Unlimited turbos:
Press R2, L1, Square, Triangle, R1, L2, L1, R2 at the main menu. A sound will confirm correct code entry.
Small cars:
Press Square, R2, L2, Triangle(2), L2, R2, Square at the main menu. A sound will confirm correct code entry.
Large tires:
Press Square, Triangle, Square, Triangle, R1(2), L2(2) at the main menu. A sound will confirm correct code entry.
TowJam car:
Press Square, Triangle, L1, R1, L2, R2, Square, Triangle at the main menu. A sound will confirm correct code entry.
Flat shaded graphics:
Press L1, R1, L2, R2, L1, R1, L2, R2 at the main menu. A sound will confirm correct code entry.
"Dude" sounds:
Press R2, R1, L2, R2, Square, Triangle, L1, R1 at the main menu. A sound will
confirm correct code entry.
