God mode
Go to the main menu and press L1 L2 L1 L2 triangle triangle square triangle circle X square square and then start a game
submitted by: Zargle
mmmh brains (1000 DNA)
Go to the mothership menu and hold L2 while pressing R1, R1, R2, R2, Left , right, left, right, R2, R1. when you done the code let go of the L2 butten. At the top it should say "mmmh brains". That means the code has been done.
submitted by: Adam
Orthopox key
Go to mothership & hold L2 while pressing square,circle,left,left,circle,square
submitted by: cheatman
Deep Thinker (Unlimited Mind Power)
R1, R2, Circle, Right D-pad, R2, Circle
Ammo-A-Plenty (Unlimited Ammo)
Left D-Pad, Circle, R2, Right D-Pad, R1, Square
More Upgrades (You must be on the Mothership)
Square, Circle, Left, Left, Circle, Square (Same buttons for the "Bulletproof cheat but different effect)
BulletProof Crypto (God Mode)
Square, Circle, Left D-Pad, Left D-Pad, Circle, Square