In The Zone

Nuclear Strike
Click on the password box in the load/save game screen, enter a code and hit [ENTER] or submit.

CHAINMAIL: grants unlimited armor.
UNLEADED: grants unlimited fuel.
GUNSRUS: grants unlimited ammo.
CHEESYPOOF : Grants everything
*Enter the following level codes the same way:
AFTERSHOCK
BLITZKRIEG
BUCCANEER
CHESSPIECE
DETONATE
HAMMERHEAD
JUNGLEWAR

Secret Mission

Go to the load/save icon, and click "enter Password". Type in"lightning" and submit it. Then when you start the game, you will go to the secret mission.

No Enemies

To get no enemies during mission 1, type in "avenger" in the enter password screen.
To get no enemy fire in mission 1, type in "eagleeye". To get an overhead view, type in "crosseyed" as a password.

Do you not see the In The Zone panel to the left?
Click Here!!