The Doom Slayer (also known by the UAC as DM1-5, DOOM Marine or The Slayer, the Demons of Hell as the Doom Slayer, the Unchained Predator, the Hell Walker or to the fandom DOOM Guy) has been the main protagonist for most the series and playable character in Doom franchise and in the upcom-ing Doom Eternal. His origin is intentionally vague, but he wears his iconic green Space Marine armor and slaughters through countless demons and monsters on a perpetual war against hell.