Full Spectrum Warrior Cheats

Infinite ammunition:
Enter "MERCENARIES" as a code. Then, create a new profile and begin the game. Note: This effects gun ammunition, but not grenade ammunition.
Authentic mode:
Enter "SWEDISHARMY" as a code. Then, create a new profile and begin the game. This is a more difficult version of the game, without the HUD.
U.S. Army version:
Enter "HA2P1PY9TUR5TLE" as a code. Then, create a new profile and begin the game.
Concept FMV sequence:
Successfully complete the game to unlock the Concept FMV sequence.

This trick will help you through most of your missions by marking your enemies. Press R2 to bring up your GPS at any time, then press Square. You will hear a woman's voice, and after about a minute she will mark the targets on your GPS. Be very careful, as there are some people that she cannot find.