Various Cheats
     Type any of the following "Codes" while playing:

Code                    Effect 
IDDQD                   God Mode 
IDCLIP                  Clipping On/Off 
IDKFA                   All Weapons 
IDCLEV                  Level Skip (1-31) 
IDBEHOLD#               Item, whereas # is a letter for each item 
IDCHOPPER               Chain Saw Plus Some Goodies 
IDFA                    Full Stocked Ammo