It's no secret that the new Doom is chock-full of Easter eggs and other surprises, but the latest is one you wouldn't find just by wandering around the game's tortured halls. Intrepid fan TomButcher has noticed that at least one tune in the soundtrack, "Cyberdemon," shows both pentagrams and the number 666 when you visualize the music's frequencies through a spectrogram. Composer Mick Gordon recently teased that this hidden sinister imagery might be present in a video (below at the 3:29 mark), but there's no doubt about it now. Clearly, he remembers the days when the original Doom's hellish artwork had some parents in a frenzy.