Cheat mode:
Enter one of the following codes during game play to activate that code function.


invincibility          iddqd
all weapons and ammo   idfa
ammo and all keys      idkfa
walk through walls     idclip
warp to a level        idclev##
get a chainsaw         idchoppers
Temporary invisibility idebeholdi  
Full automap           idbeholda  
Anti-radiation suit    idbeholdr  
Light light visor      idbeholdl