WHAT IS A “GHOST” IN DOOM II GAMES?
o A “ghost” is an abnormal Doom II monster. It can move freely through some solid surfaces, and is immune to a wide variety of attacks from players and other monsters. o A ghost is created when an Arch-Vile resurrects the crushed corpse of a monster. (Corpses are often crushed by doors closing, crushing ceilings or rising elevators.