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.

Doom II cast sequence, Doom Wiki

Cyberdemon (Doom 2016), Doom Wiki

Speardovich - Super Mario Wiki, the Mario encyclopedia

Mother demon - The Doom Wiki at

Doomguy - Wikipedia

A_BrainSpit - The Doom Wiki at

Strange Aeons - The Doom Wiki at

Invulnerability Hunter, Doom Wiki

Arachnotron (Doom Eternal), Doom Wiki

Doom Eternal, Doom Wiki

Demon - The Doom Wiki at

Arch-vile - The Doom Wiki at

Gwyn Lord of Cinder

Samur Maykr, Doom Wiki

Mighty Doom - All Bosses + Ending