Cheats Activated Within Mission from the Start Menu. Hold L2, then type the Code.

Code	Effect
Left D-Pad, Circle, R2, Right D-Pad, R1, Square	Ammo-A-Plenty (Unlimited Ammo)
R1, R2, Circle, Right D-pad, R2, Circle	Deep Thinker (Unlimited Mind Power)
R2, Right, R2, R1, Square, Right	Nobody Loves You (Resets Alert Meter)
Right, Square, R2, R1, Right, R2	Aware Like A Fox (Max Alert Meter)
Square, Circle, Left D-Pad, Left D-Pad, Circle, Square	BulletProof Crypto (God Mode)