Cheat codes
(pause gameplay and enter while holding L2):
Invincibility - UP, LEFT, DOWN, RIGHT, Triangle, Square, X, Circle.
All Weapons - UP, LEFT, RIGHT, DOWN, Triangle, Square, Circle, X.
Secondary Attack Weapon - UP, DOWN, LEFT, RIGHT, Triangle, X, Square, Circle.
Infinite Ammo - DOWN, LEFT, RIGHT, X, Square, Circle.
Collect Shield - UP, Let, RIGHT, Triangle, Square, Circle.
Stealth Mode - X, X, Square, Square, Triangle, Triangle, Circle, Circle, X, X.
