Unlimited health:

Pause game play, then hold L1 and press Triangle, Square, Triangle, Square,

Triangle, Circle, Triangle, Circle

Unlimited ammunition:

Pause game play, then hold L1 and press Left, Circle, Right, Square, Up,

Triangle, Down, X.

Daywalker difficulty setting:

Hold L1 and press Left, Circle, Up, Down, Square, Circle, X at the main

menu