Daywalker Difficulty:
At the main menu press and hold L1 then press: LEFT, CIRCLE, UP, DOWN, SQUARE, CIRLCE, X
Infinite Ammo:
Pause the game and hold L1 then press: LEFT, CIRCLE, RIGHT, SQUARE, UP, TRIANGLE, DOWN, X
Infinite Health:
Pause the game and hold L1 while you press: TRIANGLE, SQUARE, TRIANGLE, SQUARE, TRIANGLE, CIRCLE, TRIANGLE, CIRCLE
Infinite Rage:
Visit the DMV or pause the game, hold L1 and press: LEFT, DOWN, LEFT, DOWN, RIGHT, UP, RIGHT, UP
Invincibility For NPCs:
To make the players you are escorting invincible, go to the main menu and hold L1, then press: DOWN, UP, LEFT, LEFT, CIRCLE, RIGHT, DOWN, SQUARE
Unlock All Missions:
At the main menu press and hold L1, while you press: DOWN, UP, LEFT, LEFT, CIRCLE, RIGHT, DOWN, SQUARE
Unlock All Weapons:
At the main menu press and hold L1, then press: SQUARE, CIRCLE, DOWN, LEFT, CIRCLE, CIRCLE, TRIANGLE