From a TV commercial for the SNES version of Doom.
"Combine" from the PS1 version of Final Doom.
Doom instruction manual (SNES version).
"E1M1: At Doom’s Gate" from the 3DO version of Doom.
"Attack" from Final Doom, PS1.
If you’re the nervous type, I recommend that you don’t listen to this alone in a darkened room.