PO'ed - PlayStation



All Weapons: Enter Map mode by pressing Square + Select. Press Left until the map arrow points toward you, then press Start to return to standard map view. When the camera is rotating press L1 + Square + X + Circle. Exit Map mode by pressing Select. Press Triangle and you should get all the weapons.
Fart Sounds: Select "Load Game" on the main menu and press L1 + L2 + R1 + R2. Exit the Load Game menu. The butts will make a farting sound during the game.
Invincibility: Before using this code you must find the drill (or use the All Weapons code). Bring up the weapons menu and select the frying pan. Call up the weapons menu again and press Circle + R1 until 999 flashes next to your health meter.
Level Select: At the main menu press L1 + L2 + R1 + R2 + Up, then release them. press Circle to start a new game. At the Difficulty screen, press L1 + L2 + R1 + R2 + Down
No Collision Detection: 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. Press L1 + Right + Down. You should fall through the floor but you can use the jet pack to keep from falling. To return to normal, bring up the weapons menu and press L1 + Right + Down.
Refill Ammo: You must be in Foot mode for this cheat to work. Do a backflip by pressing Square + L2. While airborne press Right + X + Circle to refill your weapons.
Refill Health: You must be in Foot mode for this cheat to work. Do a back flip by pressing Square + L2. While you're in the air. press Down + X + R2 to heal yourself.
View Ending: Go to the main menu and highlight Load Game. Press and hold Right, then press Circle. Release Right and press Triangle to cancel. Next press Left + Square then press Triangle to cancel again. You should automatically go to the ending cinema.