The Cyberdemon is the final boss and most powerful monster of Doom 3. The Cyberdemon did not make an appearance in the expansion pack Resurrection of Evil, so the one that was killed at the end of Doom 3 was presumably the only one. 3. Death by Cyberdemon (2 reviews) Sign in to follow this Followers 0 By Guest About This File 1 level death match wad. It is found at the Primary Excavation Site, where it stands guard over the massive Hell Hole. “Cyberdemon” The first DOOM (2016) track on this list has two big things going for it. There is one monster, a Cyberdemon, perched up in the middle of the level guarding the BFG. Share your thoughts, experiences and the tales behind the art.