Level Select: At the main menu screen, simultaneously press L1, L2, R1, R2, and Up, then release them. Press Circle to start a new game. At the Difficulty screen, simultaneously press L1, L2, R1, R2, and Down, then release them. Pick a difficulty setting, and a level-select menu appears.

Full Inventory: Enter map mode by pressing Square and Select simultaneously. Then, while in map mode, press Left until the map arrow is pointing at you. Then press Start to return to standard map view. While the camera is rotating, press L1, Square, X, and Circle simultaneously. Then exit map mode by pressing Select. Now, when you press Triangle, you should have all the weapons.

Invincibility: First, make sure you have the drill, otherwise this cheat won't work. Bring up the weapons menu and select the frying pan. Then, bring up the weapons menu again. While the weapons menu is showing, press Circle and R1 simultaneously until "999" flashes next to your health meter. Now you are invincible.

Ammo Refill: You must be in foot mode for this cheat to work. Do a backflip by pressing Square and L2 simultaneously. During the backflip, press Right, X, and Circle simultaneously. Now, all your weapons should be filled with ammo.

Health Refill: You must be in foot mode for this cheat to work. Do a backflip by pressing Square and L2 simultaneously. During the backflip, press Down, X, and R2 simultaneously. Now, all your weapons should be filled with ammo.

Fart Sounds for the Butts: Put the cursor on "Load Game" in the main menu and press L1, L2, R1, and R2 simultaneously. Then exit the "Load Game" menu. Now the butts will make a fitting sound during the game.

See the Final Sequence: Go into the main menu and highlight "Load Game." With "Load Game" highlighted, press and hold Right, and press Circle. Release Right and press Triangle to cancel. Then press Left and Square simultaneously. Press Triangle to cancel. You should automatically go to the end cinema.

Turn Collision Detection On: You must be in jet pack mode for this cheat to work. First find any dead body and stand over it. Then press Triangle to bring up the weapons menu. In the weapons menu, press L1, Right, and Down simultaneously. You should fall through the floor, so use the jet pack to keep from falling.

Turn Collision Detection Off: Bring up the weapons menu by pressing Triangle. Then press L1, Right, and Down simultaneously.