Cheat Mode:
Pause gameplay then hold L + R and press Down, A, X, Black, B, A. The phrase 'Enter Cheat' will appear to confirm correct code entry. The following codes can now be enabled when you release L + R.

Unlock God Mode:
White, Black, Y, White, Left Trigger, Left Trigger. Your Health Meter will decrease but you won't die.

Unlock Unlimited Ammo:
Left Trigger, Y, B, Up, A, A.

Full Adrenaline Meter:
B, Y, Right, X, A, X.

Pause game-play then hold Left trigger + Right trigger and press Down, A, X, Black, A. Then enter the following combinations when the phrase 'Enter cheat' appears.

Pickup OSS Document:
A, B, Right trigger, White, Black, Left trigger

Suicide:
B, Right Trigger, White, Y, Left Trigger, White

Disable shellshock:
X, Y, A, B, Left trigger, X

Hide HUD:
Black, Left trigger, Black, Right trigger, Up, Y

Kill Nemesis:
Right, Left, Right trigger, Left trigger, X, Y


Free Medkits:
You receive a free Medkit at the end of every Level for each surviving member of your squad.

Free Revives:
You earn one revive at the end of a Mission for completing all mission objectives.