Cheat mode:
     While  playing  the game, hit the "T" key to bring up the console
window.  Then,  type any of the following cheat codes and hit ENTER to
activate the indicated cheat effect:

Cheat code:             Result:
guns                    Unlock all weapons
pos                     Position mode
health                  Maximum health
armor                   Maximum armor
ammo                    Maximum ammunition
notarget                Invisibility
god                     Enable god mode