The Former Humans (sometimes referred to by different unofficial names) are possessed and/or undead former soldiers which have been turned into Zombies during the invasion from Hell, encountered in the classic generation of Doom, Doom II, and Final Doom.

Notes

• The Former Humans have the type name MT_POSSESSED in the DOOM source code, and the sprite prefix POSS, while the analogous MT_TROOP and TROO are given to the Imps. The Former Humans were called "Demon-Possessed Humans" (or simply "Possessed Humans") in the DOOM Bible (section 7.2), being "possessed in their sleep."
• With only 20 hit points, the Humans can be gibbed with the berserk fist, rockets, the plasma rifle, the BFG9000 (both ball and tracer), exploding barrels, Demon bites, Cacodemon ranged and melee attacks, Hell Knight/Baron of Hell clawing and ranged attacks, Revenant rockets, Arch-vile fire attacks, and — on rare occasions — Imp hell-fire balls or melee attacks, a chainsaw's blade and even other Humans. This means this monster has more ways of being gibbed than any other monster.
• In a ZDoom-based source port, if the player is killed by a Former Human (monster is credited with delivering the blow that reduces player's health to 0%), an obituary message is displayed at the top of the screen: "[player name] was killed by a Zombieman".

Doom RPG

In Doom RPG, the Human appears as the "Zombie" monster class. There are three different forms, identified by color:

• Zombie Private (brown)
• Zombie Lieutenant (blue)
• Zombie Captain (normal colors)

They are weak against axe attacks.

Trivia

• In Doom II for the Game Boy Advance, a red blood splatter, half-way covered in green, appears in the Former Human's death animation.
• Their rifles were at one point accessible to the player (as their original starting weapon)
  • In the novels, the Rifle is known as the M-211 SIGCOW, and uses 10mm rounds.
• In the PlayStation port of Doom, their gunshot damage is increased somewhat, up to a maximum damage of roughly 21. The manual also lists the name of this enemy type as "Former Soldier", as opposed to "Former Human" as in the PC versions' manuals (or "Zombieman" as in the enemy cast at the end of the game).