Monster Things

Codenames and details for 25 Boom Things that are commonly implemented as enemies in games and mods. "Monster Things" are a subset of "Map Things" that have behavior controlled by parameters you can change using BEX, with a few hard-coded exceptions.

Each Thing entry notes the name of the monster that implements that Thing in Doom, Freedoom, and Xeno Quest. Hideous Destructor implementations are a best guess association based on the HD manual. Mugshots are all from the freely licensed Freedoom manual.

PLAYER (Thing 1)

• 
• Hard-coded behavior
  • shares state with all other player things
• Implementation
  • Doom: Our Hero (Player)
  • Freedoom: Savior of Humanity
  • Hideous Destructor: Operator

POSSESSED (Thing 2)

• 
• Hard-coded behavior
  • drops Thing 64 on death
• Implementation
  • Doom: Former Human (Trooper)
  • Freedoom: Zombie
  • Hideous Destructor: Undead Homeboy

SHOTGUY (Thing 3)

• 
• Hard-coded behavior
  • drops Thing 78 on death
• Implementation
  • Doom: Former Human Sergeant (Sergeant)
  • Freedoom: Shotgun Zombie
  • Hideous Destructor: Jack-Booted Thug

VILE (Thing 4)

• 
• Hard-coded behavior
  • other monsters will never target this monster
• Implementation
  • Doom: Arch-vile (Archvile)
  • Freedoom: Necromancer
  • Hideous Destructor: Necromancer

UNDEAD (Thing 6)

• 
• Implementation
  • Doom: Revenant
  • Freedoom: Dark Soldier
  • Hideous Destructor: Dark Soldier

FATSO (Thing 9)

• 
• Hard-coded behavior
  • special map action on death
• Implementation
  • Doom: Mancubus
  • Freedoom: Combat Slug
  • Hideous Destructor: Combat Slug

CHAINGUY (Thing 11)

• 
• Hard-coded behavior
  • drops Thing 74 on death
• Implementation
  • Doom: Heavy weapon dude (Chaingun Sargeant)
  • Freedoom: Minigun Zombie
  • Hideous Destructor: Machine Gunner

TROOP (Thing 12)

• 
• Implementation
  • Doom: Imp
  • Freedoom: Serpentipede
  • Hideous Destructor: Serpentipedes
  • Valiant: Super Imp

SERGEANT (Thing 13)

• 
• Implementation
  • Doom: Demon
  • Freedoom: Flesh Worm
  • Hideous Destructor: Babuin
  • Valiant: Super Demon

SHADOWS (Thing 14)

• 
• Implementation
  • Doom: Spectre
  • Freedoom: Stealth Worm
  • Hideous Destructor: Ninja Pirate

HEAD (Thing 15)

• 
• Implementation
  • Doom: Cacodemon
  • Freedoom: Trilobite
  • Hideous Destructor: Trilobite

BRUISER (Thing 16)

• 
• Hard-coded behavior
  • special map action on death
  • immune to damage from BRUISER or KNIGHT
• Implementation
  • Doom: Baron of Hell
  • Freedoom: Pain Lord
  • Hideous Destructor: Pain Lord
  • Valiant: Super Mancubus

KNIGHT (Thing 18)

• 
• Hard-coded behavior
  • immune to damage from BRUISER or KNIGHT
• Implementation
  • Doom: Hell Knight
  • Freedoom: Pain Bringer
  • Hideous Destructor: Pain Bringer
  • Valiant: Pyro Knight

SKULL (Thing 19)

• 
• Implementation
  • Doom: Lost Soul
  • Freedoom: Deadflare
  • Hideous Destructor: The Begotten

SPIDER (Thing 20)

• 
• Hard-coded behavior
  • special map action on death
  • immune to splash damage
• Implementation
  • Doom: Spiderdemon (Spider Mastermind)
  • Freedoom: Large Technospider
  • Hideous Destructor: Large Technospider
  • Valiant: Cybruiser

BABY (Thing 21)

• 
• Hard-coded behavior
  • special map action on death
• Implementation
  • Doom: Arachnotron
  • Freedoom: Technospider
  • Hideous Destructor: Technospider

CYBORG (Thing 22)

• 
• Hard-coded behavior
  • special map action on death
  • immune to splash damage
• Implementation
  • Doom: Cyberdemon
  • Freedoom: Assault Tripod
  • Hideous Destructor: Assault Tripod

PAIN (Thing 23)

• 
• Implementation
  • Doom: Pain Elemental
  • Freedoom: Summoner
  • Hideous Destructor: Hive Pit

WOLFSS (Thing 24)

• 
• Hard-coded behavior
  • drops Thing 64 on death
• Implementation
  • Doom: Wolfenstein SS (SS Nazi)
  • Freedoom: Sailor (banned)
  • Valiant: Chaingunner

KEEN (Thing 25)

• 
• Hard-coded behavior
  • special map action on death
• Implementation
  • Doom: Commander Keen
  • Freedoom: Pod Creature

BOSSBRAIN (Thing 26)

• 
• Hard-coded behavior
  • special map action on death
• Implementation
  • Doom: Boss Brain
  • Freedoom: Big Brain
  • Hideous Destructor: The Tyrant

BOSSSPIT (Thing 27)

• 
• Hard-coded behavior
  • interacts with Thing 28
• Implementation
  • Doom: Demon Spawner
  • Freedoom: Spawner

SPAWNSHOT (Thing 29)

• 
• Hard-coded behavior
  • interacts with Thing 28
• Implementation
  • Doom: Demon Spawn Cube
  • Freedoom: Spawn Cube
  • Hideous Destructor: Putto

BARREL (Thing 31)

• 
• Implementation
  • Doom: Exploding Barrel
  • Freedoom: Exploding Barrel
  • Hideous Destructor: Frag Containment Storage Cell

FLAMING BARREL (Thing 128)

• 
• Implementation
  • Doom: decoration
  • Freedoom: decoration
  • Hideous Destructor: Frag Containment Oxidation Processor

MISC37 (Thing 88)

• 
• Implementation
  • Doom: Pillar with Heart
  • Freedoom: Blood Fountain
  • Valiant: Lightning Orb

MISC40 (Thing 91)

• 
• Implementation
  • Doom: Grey Tree
  • Freedoom: Short Grey Tree
  • Valiant: Ghost Arch-vile

MISC65 (Thing 116)

• Implementation
  • Doom: Dead Lost Soul
  • Valiant: Suicide Bomber

MISC76 (Thing 127)

• 
• Implementation
  • Doom: Large Tree
  • Freedoom: Large Brown Tree
  • Valiant: Ghost Revenant