Visit the Demons Human Conversion Lab 
and Help save your friends...  If you 
think you're bad, try this one out in
NIGHTMARE!!!..   This is an EXCELLENT 
external .WAD file for DOOM.  It uses 
Episode 1 Mission 1 to run. Difficulty 
is varied by choice in DOOM, Allows 
multiplayer  and Excellent for Death-
Match.  Hope you enjoy!!