Cyberdemon
Cyberdemon (Doom Eternal).jpg
General Information
Universe Commander Keen / Wolfenstein / DooM metaseries
Aliases Harbinger, Hell Tyrant, Steam Demon, Tyrant
Classification Furvuseques nobilis
Species Type Dark Knight
Homeworld Hell
Environment Depths of Hell
Intelligence Sapient (presumed)
Biochemistry Carbon-based lifeform
Discovered 1941
Discoverer B.J. Blascowicz
Biological Information
Lifespan At least centuries long; likely cannot die of old age
Reproduction Sexual; gives live birth (presumed)
Average Height ~20ft
Locomotion Bipedal
Feeding Behavior Carnivorous
Distinctive Features Cybernetic leg and rocket launcher arm (added long after birth)
Eye Color Black
Skin Color Tan
Lineage Information
Related Species Baron of Hell, Hell Knight
Cultural Information
Alignment Lawful Evil
Personality Cruel and brutal
Organization Solitary
Affiliation(s) Hell
Leaders Spider Mastermind
Sociocultral characteristics
Members Harbinger of Doom
Scientific Taxonomy
Planet Hell
Domain Eukaryota
Kingdom Animalia
Subkingdom Faunaspirtia
Phylum Mairoa
Class Daemonia
Order Demonica
Suborder Demomammalia
Infraorder Pecorademona (Ruminants usually with cranial appendages projecting from frontal bones)
Family Bovidaemonidae (Bovid demons)
Subfamily Baphometinae (Goat- or cattle-like humanoids)
(Somarinoa, 2020)
Infrafamily Baphometodd (Goat-like humanoids)
(Somarinoa, 2020)
Genus Furvuseques (Dark Knights) (Somarinoa, 2020)
Species F. nobilis (Somarinoa, 2020)
Other Information
Status Data deficient
Creator Icon of Sin (presumed)
First Sighting 1942
Last Sighting 2150

"Half unfeeling machine, half raging horned devil. This walking nightmare has a rocket launcher for an arm and will definitely reach out and touch you. Make sure you're loaded for bear before you take on this guy."
— Game manual for DooM on SNES and PSX and DooM 64


The Cyberdemons (Furvuseques nobilis) (also known as Harbingers, Hell Tyrants, Steam Demons, Tyrants) is a species of Dark Knight demon indigenous to the confines of Hell, closely related to both the Hell Knights and Barons of Hell. Although the species is never given a proper name, they are best known by their rank in the armies of Hell, though they are not the only demonic race to hold this rank. They are, however, the best-known race to hold this rank. Another genetically unrelated demonic race to fill the rank of Cyberdemon is the split-jawed Baalgar.

Physiology[edit | edit source]

An older Cyberdemon, or a very closely-related subspecies.

This species of Cyberdemon are roughly 20ft tall, and are very muscular. They have a minotaur-like heads with black, beady eyes set far aparet and a pair of dark gray horns growing outwards and forward from the temples. Most members have tan skin, though older members (or perhaps an alternative subspecies) have brown skin; ultimately their skin becomes more reddish in tone. It appears that as they get older they gain more features, with typical Cyberdemons having a flat face and no pronounced nose structure; eventually their facial structure extending out slightly first to give a more bovine-shaped head and canine-like face, and then later growing a tail. They have cloven hooves for feet and walk like a typical ungulate. However unlike most ungulates, the Cyberdemons possess a complement of razor-sharp teeth.


The eldest known physiological appearance of a Cyberdemon, if not another subspecies.

They are not born with their cybernetic implants and instead this is Human tech integrated into their systems to make them even more dangerous, following the fate of their comrade, the Harbinger of Doom less likely due to solidarity and more likely from simply noticing his improved destructive power. These enhancements are known to be placed on the arms, legs, spine, head, and within the exposed viscera, though not all members utilize the same enhancements.

They are often considered to be some of the most powerful and formidable soldiers of Hell's armies and might grow more intelligent as they get older, though this is perhaps due to combat experience. Certain members are known to lead their shots, firing their third rockets at their opponent's anticipated position instead of where they currently are.

Appearances[edit | edit source]

  • Wolfenstein RPG (in-universe chronological first appearance)
  • DooM (First appearance)
  • DooM RPG
  • DooM II RPG
  • DooM II: Hell on Earth
    • The Ultimate DooM
    • Final DooM
  • DooM 64
  • DooM 3
  • DooM (2016)
  • DooM Eternal
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