MISC CODES (Pause the game and then enter the following):

All Weapons -
Hold L2 and press Up, Left, Right, Down, Triangle, Square, Circle, and then X

Collect shield -
Hold L2 and then press Up, Left, Right, Triangle, Square, Circle

Infinite ammo -
Hold L2 and press Down, Left, Right, X, Square, Circle

Invencibility -
Hold L2 and press Up, Left, Down, Right, Triangle, Square, X, and Circle

Stealth mode -
Hold L2 and then press X, X, Square, Square, Triangle, Triangle, Circle, Circle, X, X

Weapon's Secondary Attacks -
Hold L2 and the press Up, Down, Left, Right, Triangle, X, Square, Circle


GAMEBUSTER CODES:

Infinite Health -
8426DC94 92A4

Infinite Bullets on pickup -
8422CF17 9F41

Infinite Grenades on pickup -
8422C387 8BD5

Infinite Time -
842AD0B6 C6A9