No, this isn't some lame conspiracy created by an anti-video game Christian group. The makers of the game Doom hid an easter egg in a place you would never expect: The real world. Specifically the audio, but revealing it takes a little bit of work and some audio knowledge. If you run the song "Cyberdemon" through a spectogram you will see the numbers 666 and a pentagram! This is one of the most clever, nerdy, and depending on your religious affiliation, scary easter eggs ever! Props to the creators of the new Doom game for pulling this off. There are videos on YouTube proving that the easter egg exists. Pretty neat (unless you are offended by it).