Final boss - The Doom Wiki at

The final boss (often informally called the Icon of Sin because of the Doom II level of which it is a part) is the final boss of Doom II, in MAP30: Icon of Sin.

Whiplash, Doom Wiki

Mancubus - The Doom Wiki at

The Ancient Gods - Part Two, Doom Wiki

Cyberdemon (Doom 3) - The Doom Wiki at

Vagary, Doom Wiki

Doom's protagonists, Doom Wiki

Tyrant, Doom Wiki

Icon of Sin (Character) - Giant Bomb

Cyberdemon (Doom 3), Doom Wiki

Spider Mastermind (Doom 2016), Doom Wiki

Dark Lord, Doom Wiki

Strange Aeons - The Doom Wiki at

Mother demon - The Doom Wiki at