All Weapons:
Start a mission, pause the game and press Square, Circle, R1, L1, R1+R2. This code must be re-entered on each level.
Invincibility:
Start a mission, pause the game and press Square, Circle, L1, L1 + L2. This code must be re-entered on each level.
Level Select:
At the Main Menu, press Square, Circle, R1, L1, R1+L1.
Run faster in Multiplayer:
Hold Square + Triangle to chase your opponent more quickly.
GameShark Codes
Infinite Health 800432a02400
Infinite Ammo 80057fd22400
Infinite Flamethrower 80058e3e2400
Fuel