Aubrey Hodges is the guy behind the dark ambient music used in Playstation Doom and Doom 64. Yesterday he dropped a new album. For $15 you get 2 hours of new creepy original dark ambient Doom-like music.
"Although not directly Doom related, it is most certainly Doom-like in many ways. It's based in the Zorn Empire which is part of the MistWorlds Rpg setting. The Zorn are a species who subjugate planets and darkness and evil are their middle names! Also, if you purchase the album, feel free to use the tracks in your Doom mods provided you credit the material and provide a link to the album on bandcamp. "