One hit knock outs:
Hold L1 + R1 and press X, Circle, Circle, X at the main menu.
High speed mode:
Hold L1 + R1 and press Circle, Circle, Triangle, Triangle at the main menu.
Chicken heads:
Hold L1 + R1 and press X, Circle, Circle, Square at the main menu.
Toy block cars:
Hold L1 + R1 press Circle, Circle, Triangle, Square at the main menu.
Disable HUD:
Hold L1 + R1 and press X, Square, Triangle, Circle at the main menu.
Japanese Crash:
Hold L1 + R1 and press Square, Circle, Square, Circle at the main menu.
