Big Head Mode:
Enter NickWest as a code.
Unlimited Ammunition:
Enter MERCENARIES as a code.
Authentic Mode:
Enter SWEDISHARMY as a code.
This is a more difficult version of the game, without the HUD.
Unlock Official Army Training Version:
Enter ha2p1py9tur5tle as a code.
Unlock Concept Movie:
Beat the game.
See the Developers' Faces:
After you bail out the pinned Down SAS soldiers in level 5 you'll see some mass graves. Zoom in on the graves and you'll see the devs faces.
