All weapons:
At the Main Menu, hold L1 and press Square, Circle, Down, Left, Circle, Circle, Triangle.

Daywalker Difficulty:
At the Main Menu, hold L1 and press Left, Circle, Up, Down, Square, Circle, X

Mission Select:
At the Main Menu, hold L1 and press Down, Up, Left, Left, Circle, Right, Down, Square.

Unlimited Health:
During play, pause, hold L1 and press Triangle, Square, Triangle, Square, Triangle, Circle, Triangle, Circle.

Unlimited Rage:
During play, pause, hold L1 and press Left, Down, Left, Down, Right, Up, Right, Up