There's an exploit in the first Chapter 1 The Pyrenees. To unlock a special weapon in the game known as the M468 Assault Rifle, hold down the R1 button at the title screen as you insert the following code: Up, Triangle, Down, X, Left, Square, Right, Circle, Left, Left, Right, Square. To shoot lasers instead of bullets in single player mode, pause your game and hold down the R1 button as you insert the following button combination to activate the cheat: 元, 元, X, R3, R3, Circle, 元, 元, Square, R3, R3, Triangle. If you're playing a single player game, pause your game and hold down the R1 button as you insert the following button combination to achieve Third Person View: Square, Circle, Square, Circle, 元, 元, Triangle, X, Triangle, X, R3, R3.
If inserted correctly, you will unlock one-hit kills for both you and your opponents. During single player mode, pause your game and hold down the R1 button while entering the following button combination: 元, R3, 元, R3, X, Circle, 元, R3, 元, R3 Square, Triangle.