Zombie (former human)
Zombies are undead soldiers. They are the only non-demonic enemies in the game and the only ones to drop ammunition when killed.
Due to their bullet weapons, they are the only enemies besides the Spider Mastermind that can be easily made to engage in monster infighting with others of the same type.
In the Doom novels, zombies are found in various forms, from former civilians to soldiers. The former commando, however, is not a zombie- given the name Clyde, they are either genetically engineered human copies or human traitors who have been genetically altered to look alike.
|Location(s):||Throughout all levels.|
|Ablities:||Wields a rifle.|
The Imp is the basic demonic enemy and common in all of the games, where they appear with a relatively humanoid appearance.
In the original games, Imps have brown skin, red eyes, and spikes on their shoulders, elbows and knees. They usually emit a hissing sound when alerted as they attack at long distance by firing fireballs from their hands, and up close by scratching with sharp claws.
In the Doom novels, Imps appear as they do in the older games - however, some can talk, as they are made "leaders" of small groups.
|Ablities:||Long distance fireballs and scratching claws.|
Baron of Hell
Barons of Hell resemble satyrs, with pink torsos and brown legs. An alternative view is that they resemble the classical 'goat-legged' depiction of Satan.
They attack the player by scratching with their claws when close or throwing green balls of energy at a distance. A pair of Barons, referred to internally by id Software as the "Bruiser Brothers" (a reference to the Hammer Brothers from the Mario series), star as the bosses at the end of Knee-Deep in the Dead, the first episode of Doom.
Barons also appear as regular enemies in the later episodes and in the sequels to the game.
|Location(s):||First encountered at the end of first episode.|
|Ablities:||Long distance balls of energy and scratching.|
A Cacodemon is also a kind of demon or spirit. Cacodemons are large round floating red heads, with small horns, one eye, and a large mouth that can spit ball lightning and bite.
The Cacodemon graphic first appeared in the code of an alpha version of Doom, released on May 22, 1993; it first appeared as a live adversary in a press release version of Doom released on October 4, 1993.
In the finished game, played at the default skill level, the Cacodemon first appears in the first level of the second episode of Doom.
|Location(s):||Episode 2 & 3.|
|Ablities:||Spits balls of lightning and bite|