unlock all weapons:
press START while playing and enter UP, DOWN, RIGHT, LEFT, R1, R2, L1, L2.
unlimited health:
press START while playing and enter X, LEFT, CIRCLE, RIGHT, R2, L2, UP, UP. Alternately, enter UP, DOWN, RIGHT, LEFT, R1, R2, L1, L2.
Cheats:
Pause the game and enter the codes during gameplay. A voice byte will play if the code was accepted.
All weapons – UP, DOWN, LEFT, RIGHT, LEFT, RIGHT, LEFT, LEFT
Inf ammo – UP, DOWN, LEFT, RIGHT, UP, LEFT, DOWN, RIGHT
Inf Necroplasm – UP, DOWN, LEFT, RIGHT, DOWN, LEFT, UP, RIGHT
No blood – UP, DOWN, LEFT, RIGHT, UP, UP, UP, UP.
Unlock all comics – UP, DOWN, LEFT, RIGHT, RIGHT, LEFT, LEFT, UP.
All missions – UP, DOWN, LEFT, RIGHT, LEFT, LEFT, RIGHT, RIGHT.
Encyclopedia – UP, DOWN, LEFT, RIGHT, LEFT,RIGHT, UP, DOWN.