Various cheats
     To activate and use the Cheat Codes for this game, While playing,
press the Talk button (the default key is T), and then type any of the
following codes and press [Enter].

Cheat code:              Effect:

god                      God Mode

ammo                     Full Ammo

guns                     All Weapons

kfa                      All Weapons, Full Ammo

tears                    Unlimited Ammo

poltergeist              Ghost Mode

maphole                  Skip Level