Pause the game and enter the codes during gameplay.

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.