While playing the game, press the following combinations:
Infinite Ammo: L1, L2, R1, R2, triangle
More Looting: R1, L1, R2, L1, triangle
Punches Decapitate: L1, L2, R1, R2, square
Invulnerability: L1, L2, R1, R2, X
Unlimited Time: L1, L2, R1, R2, circle