Final boss



The Icon of Sin (sometimes called Baphomet in both the Doom community and various levels and add-ons) is the boss of Doom II MAP30: Icon of Sin as well as MAP30 of TNT: Evilution and Plutonia (In which it is referred to as the "Gatekeeper"). See the walkthrough for a gameplay description.

All the other monsters are a single Doom thing, but the Icon of Sin is made up of a number of parts:
 * Romero's head is the thing that must be destroyed. It starts with 250 hit points, but it is hard to hit due to its location deep in a hole.
 * A Spawn shooter in front of the head launches skull cubes.
 * Several Spawn spots are located around the map. These are where the skull cubes land and spawn a monster.
 * Wall textures ZZZFACE1 through ZZZFACE9 are arranged to construct a demon face with a hole into its brain. This is what the player sees as the Icon, but it has little to do with its functioning.

Trivia
Reversed, the DSBOSSIT is a distorted John Romero saying "To win the game you must kill me, John Romero".