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Stop hand

Oremor nhoj em llik tsum uoy emag eht niw ot.
~ Icon of Sin's reversed alert sound. Un-reversed: To win the game, you must kill me, John Romero.

The Icon of Sin is the final boss in Doom II and Doom Eternal.


The Icon of Sin is a gigantic, grotesque head of a demon embedded on a wall. It's forehead is open, exposing it's brain. The eyes are white without pupils. Even though the Icon of Sin talks, it's mouth doesn't move. The Icon of Sin appears as a massive, goat-like biomechanical head on a wall, with a surgically exposed brain that allows it to spawn endless scores of demons. Although only its head is visible, the endgame text indicates that the entity has a gigantic body as well.

In Doom II, the boss is not referred to by any specific name. The Doom II Official Guide refers to it as the "Dark One". It is known in the Final Doom manual introductory story as Baphomet.

The final boss is not an actual monster in the technical sense, since it does not count towards the monster kills percentage at the end of a level, and is not affected by the command line parameters that affect standard monsters.



The Icon of Sin unleashes an endless amount of monsters except for Cyberdemons, Spider Masterminds, and zombies. The Icon of Sin will launch a cube towards the surface next to the player. When the cube hits the surface, it spawns into a random monster. The boss will launch another cube whether or not the player is still fighting the current monster. This means the player can fight a multitude of enemies at once. When defeated, the Icon of Sin along with the spawned monsters disintegrates.

Doom (2016)

The Icon of Sin has a minor appearance in the 2016 reboot of the Doom franchise. Tablets in Argent D'Nur suggests that it is the revived/transformed son of the traitorous Night Sentinel. It is dormant in this game.

There is also a small easter egg relating to it as well. Shooting the Icon of Sin in the forehead will make it say it's classic line from Doom II, and then shoot a cube that holds a Doomguy figurine.

Doom Eternal

The Icon of Sin returns as the final boss of Doom Eternal. The Icon was the son of the Betrayer, who lost him in a battle against the demons. The Betrayer made a pact with Hell Priests, and in turn, revived his son into the monstrous titan he is now.

Conceptual Designs

It was a late night and the walls were shaking at ID Software. Why? There could be only one reason: Romero is in the building! Otherwise, it was a quiet, unassuming office. Better yet, a library. Then things quieted down, and I supposed that Romero had left. In fact, everyone but Romero had left. As I discovered when he came into the room I was using for "sound development." He sat down next to me and said that we needed a sound for the final boss to make when a player enters that level. I said that I had some possibilities roughed out and since he was there we could plug them into the code to see how they'd work. We went into John's office to look at the level (he had the only 21" screen). While he was whizzing around the level, all of a sudden he said, "Wait, what's that?" He had clipping off, which means that he could walk through otherwise "solid" objects. He had walked into the wall where the final boss head was attached. Low and behold, there inside the brain of the boss was Romero's head on a stick! We both laughed a while and Romero decided that the artists (Adrian Carmack and Kevin Cloud) had put it there as a joke. As it turned out, John Carmack had programmed the code so that Romero's head was the object that a player had to hit in order to kill the boss. And this head was down a shaft inside of the wall so it was normally out of sight. It was at that point that Romero and I decided to record his voice and use it as the final boss sound. We went back into the sound room and John started saying different things in a very pumped up voice. He finally said "To win the game, you must kill me, John Romero." I took that phrase and put some phasing on it and then reversed it. Shades of the rumors of "Satan" on different pop recordings! We decided not to tell anyone else what it said. We had the fun of seeing the artists' expressions when they first entered the level with this sound going. We made them sweat a long time before we played the phrase in its original form. Can you tell that we always had a great time doing this stuff?
~ Robert Prince



  • In 2016, John Romero revealed to a Twitter user that Icon of Sin was the official Doom II boss name since 1994.


           78-782068 doom-logo Villains

Demons | Former Humans

Doom 3


Arch-Viles | Cacodemons | Cherubs | Hell Knights | Imps | Lost souls | Maggots | Mancubus | Pinkies | Revenants | Ticks | Trites | Wraiths | Zombies (Zombie security, Zombie Commandos)


Vagary | Guardian of Hell and Seekers | Sabaoth | Cyberdemon

Doom 3: Resurrection of Evil


Bio Suit zombies | Bruisers | Forgotten Ones | Vulgars


Hell Hunters (Hell Time Hunter,Berserk Hunter,Invulnerability Hunter) | Maledict

Doom 2016


The possessed (Possessed Scientists,Possessed workers,Possessed Engineers,Possessed Soldiers,Possessed Security,Unwilling) | Barons of Hell | Cacodemons | Imps | Harvesters | Hell Knights | Hell Razers | Lost souls | Pinkies | Prowlers | Revenants | Spectres | Summoners


Cyberdemon | Hell Guards | Spider Mastermind


Olivia Pierce | Samuel Hayden

Doom Eternal


Arch-Viles | Arachnotrons | Barons of Hell | Cacodemons | Carcasses | Cyber Mancubus | Cyborg Zombies | Dread Knights | Former Humans | Gargoyles | Hell Knights | Imps | Lost souls | Mancubus | Maykr drones | Pain Elementals | Pinkies | Prowlers | Revenants | Spectres | Tentacles | Titans | Tyrants | Whiplashes | Zombies


Doom Hunters | Marauders | Gladiator | Khan Maykr | Icon of Sin


Deag Ranak | Deag Nilox | Deag Grav

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