Hold L and press Left, B, Up, Down, X, B, A at the main menu.
Defeating Midget Vampires
When you see midget vampires on any level, punch them with your fist and they will fly back. If you punch them in front of a wall, they will hit it, then hit the ground.
Escorted NPCs are invincible
Pause game play, then hold L and press X, B, Y, A, X, B, Y, A. This code can only be enabled in levels that you are escorting NPCs.
Level select
Hold L and press Down, Up, Left(2), B, Right, Down, X at the main menu.
Unlimited ammunition
Pause game play, then hold L and press Left, B, Right, X, Up, Y, Down, A.
Unlimited health
Pause game play, then hold L and press Y, X, Y, X, Y, B, Y, B.
Unlimited rage
Pause game play, then hold L and press Left, Down, Left, Down, Right, Up, Right, Up.
Unlock all weapons
Go to the Menu screen and hold L and press X, B, Down, Left, B, B, Y.
Daywalker difficulty setting...