Master Cheat:
Go to the cheats screen at the options menu and put in Square, Circle, Triangle, Circle, Square, X, Triangle, X. Also reported as Triangle, Triangle, X, X, Square, Circle, Square, Circle

Get Unlimited Grenades:
Go to the cheats screen at the options menu and put in Circle, X, Circle, Square, X, Circle, X, Circle

Get Max health:
Go to the cheats screen at the options menu and put in X, X, Square, Triangle, Square, Triangle, Circle

Get Crazy Deaths:
Go to the cheats screen at the options menu and put in Triangle, Triangle, Triangle, Triangle, Triangle, Triangle, Triangle, Triangle

Get Rain of Fire:
Go to the cheats screen at the options menu and put in Square, Square, Square, Square, Square, Square, Square, Square

Get Rapid Rails:
Go to the cheats screen at the options menu and put in Circle, Square, Circle, Square, X, X, Triangle, Triangle

Get Director's Cut:
Go to the cheats screen at the options menu and put in Square, X, Circle, Triangle, Circle, X, Square, Triangle

Get Gibby Explosions:
Go to the cheats screen at the options menu and put in Triangle, Circle, X, Square, Triangle, Circle, X, Square

Get Unlimited Ammo:
Go to the cheats screen at the options menu and put in Square, Triangle, X, Circle, Square, Circle, X, Triangle

Get Walking Dead:
Go to the cheats screen at the options menu and put in X, X, X, X, X, X, X, X