Bulletproof Mode

At the "New Game" screen hold L1, L2, R1, R2, and press Up(x3), Square, Down. Jack will be totally Bulletproof.

Infinite Adrenaline

At the new game screen, hold L1, L2, R1 and R2, then press Left, Right, Left, Circle, Square.

Invisible Jack

At the new game screen, hold L1, L2, R1, R2, then press Triangle, Triangle, Up, Up, Triangle. Note: Enemies can still see Jack, but all you see is the ball shadow.

Infinite Adrenaline

Hold L1, L2, R1, and R2, then press Left, Right, Left, Circle, Square.

Unlimited .50s

Hold L1, L2, R1 and R2, then press Triangle, Circle, Up, Up, Up.

Defeating Diggs

Diggs is the ex boxer you will have to face in the later part of the game. When he reaches three quarters of his health, gas which will hurt you will be turned on. You can knock off his gas mask and put it on. Keep pressing Triangle to dive and he cannot touch you. His power will slowly go down, and he will soon be defeated.

Flaming Fisted Man Warning

After defeating Flaming Fisted Man, the game restarts itself. This does not allow you to save your game, meaning that you either start a new game or continue fighting Flaming Fist Man repeatedly.

Chapter 1: All Pistol Disarms

When you start the level, a man will appear and try to shoot you. Lock on to him and use your dog (Shadow) to kill him. Shadow will bring his gun to you. When you kill him, another man by a crane will start to shoot. Lock on to him and shoot him with the gun you received. When you kill him, some pipes will fall down, making it appear as if you cannot get through. However, you can. Immediately when you enter, a man will come up behind you and say "Drop it!". You will throw down your weapon and turn around. When you turn around, you will not be able to move anymore -- this will make it easier. You will be prompted to press Circle to disarm him. You can either do that, or do it with the Analog-stick. To get all of them, keep doing the level over or try it the old fashioned way.