Project Overkill PS Cheats

Cloak:

Pause the game and highlight "Sound Volume." Hold Triangle and press 
Square, Circle, Circle, Square, then release Triangle; now hold down X and press 
Triangle, Triangle, then release X. You'll see the word 'cheater' to confirm. 
 Turbo:

  Pause the game and highlight "Sound Volume." Hold Up and press Triangle, 
  Triangle, Triangle, then release Up; now hold Down, press X, Square, Circle, 
  and release Down. You'll see the word 'cheater' to confirm. 
 Life Refill:

  Pause the game and highlight "Sound Volume." Hold Square and press 
  Circle, X, Triangle, then release Square; now hold Circle and press Square, 
  X, Triangle, and release Circle. You'll see the word 'cheater' to confirm. 
 Shield:

  Pause the game and highlight "Sound Volume." Hold Right and press 
  Circle, Square, Triangle, then release Right; now hold Left and press Square, 
  Circle, X, and release Left. You'll see the word 'cheater' to confirm.
 Refill ammo: 

  Pause the game and highlight "Sound Volume." Hold Circle and press 
  Square, then release Circle; now hold Triangle, and press X. Release Triangle, 
  then hold Circle and press X. Release Circle, then hold X and press Square. 
  Release X. You'll see the word 'cheater' to confirm.




Thanks to Revolution readers Mr. Orbital D. Boy, Steve Jackson, Chris Ray, 
  and X. Calypso!