Demon Key

The three Demon Keys (sometimes called Demon Artifacts) are special items found only in Doom 64, used to upgrade the Unmaker. The three keys are golden, pink and blue in hue. One each is to be found in the secret levels Outpost Omega; The Lair and In The Void.

They are also used in the final level The Absolution to disable the demon teleporters in the level.