Unfinished Doom 3 monsters

Multiple unfinished concepts for Doom 3 monsters were cut during the design process and did not make it into the finished game. Various concept designs of these monsters were shown among pre-release Doom 3 promotional materials. Eventually, some of the unfinished monsters were finished and used in the Doom 3 expansion, Resurrection of Evil.

Arch-vile
The original concept for the arch-vile, seen in the December 2002 issue of PC Gamer, initially went unused in the final game. It was eventually recycled as the model for the vulgar in the Resurrection of Evil expansion pack. Differences from its use as the vulgar included an upright walking posture and orange glowing eyes.

Birdman
The birdman (a community-applied name for the monster, due to perceived bird-like features of its face) was displayed in the id Tech 4 demo presented by John Carmack. It is commonly thought to have been an early model for the Hell knight based on its apparent size and animations.

Spiderdemon
A full concept was created for the spiderdemon, which might have also doubled as an arachnotron. Neither monster was in the final game, however, with the spider-based theme being carried on instead by the trite, tick, and vagary, in a more purely organic style. The arachnotron was later realized in the Doom 3: Phobos modification.

Unused Demon Model
This demon is a peculiar one. The shape is nothing like any others found in-game. Some fans speculate that due to its size and similar hands, this was an early version of the Guardian of Hell boss found in Hell (Doom 3 level). Due to the fact that the model is fully textured and still remains in the game's files, the idea that this is an early version of a demon found in-game is most likely just speculation. It is safe to assume that this unused demon was cut late into development.



Other Unused Concepts
In the Limited Collector's Edition version of Doom 3 for, an extra included is a concept art gallery. Featured in the gallery is an entire section dedicated to unused monsters and characters. Little is known about the original purposes of the cut characters however.