EntityDef/AI (Eternal)

Each AI may only be spawned in their respected campaign AND anything released after.
For example, Spirits can be spawned in any TAG1 or TAG2 level, but not in the Base Campaign.

Base Campaign

ai/ambient/buffpod
ai/ambient/tentacle
ai/ambient/zombie_cueball
ai/fodder/carcass
ai/fodder/gargoyle
ai/fodder/imp
ai/fodder/lostsoul
ai/fodder/prowler
ai/fodder/soldier_blaster
ai/fodder/soldier_shield
ai/fodder/zombie_maykr
ai/fodder/zombie_t1_hell
ai/fodder/zombie_t1_scientist
ai/fodder/zombie_tier_1
ai/fodder/zombie_tier_3
ai/heavy/arachnotron
ai/heavy/cacodemon
ai/heavy/dreadknight
ai/heavy/hellknight
ai/heavy/mancubus_fire
ai/heavy/mancubus_goo
ai/heavy/painelemental
ai/heavy/pinky
ai/heavy/pinky_spectre
ai/heavy/revenant
ai/heavy/whiplash
ai/heavy/whiplash_spectre
ai/superheavy/archvile
ai/superheavy/baron
ai/superheavy/doom_hunter
ai/superheavy/marauder
ai/superheavy/marauder_wolf
ai/superheavy/tyrant

The Ancient Gods - Part 1

ai/ambient/spirit
ai/ambient/super_tentacle
ai/ambient/turret
ai/heavy/bloodangel
ai/superheavy/baron_armored

The Ancient Gods - Part 2

ai/ambient/demonic_trooper
ai/fodder/imp_stone
ai/fodder/prowler_cursed
ai/fodder/soldier_chaingun
ai/fodder/zombie_t1_screecher

Bosses

Most bosses may only be spawned in the level they appear in.

DOOM Hunter Base

ai/superheavy/doomhunter_gold_stage1
ai/superheavy/doomhunter_gold_stage2
ai/superheavy/doomhunter_stage1
ai/superheavy/doomhunter_stage2

Sentinel Prime

ai/boss/gladiator_gold
ai/boss/gladiator

Urdak

ai/fodder/maykr_minion
ai/boss/khan_maykr

Final Sin

ai/boss/icon_of_sin_base
ai/boss/icon_of_sin_stage2

Blood Swamps

ai/friendly/wolf

The Holt

ai/ambient/spirit_samuel
ai/boss/samuel

The Dark Lord

ai/boss/darklord
ai/boss/darklord/summoned/arachnotron
ai/boss/darklord/summoned/baron
ai/boss/darklord/summoned/hellknight
ai/boss/darklord/summoned/mancubus_fire
ai/boss/darklord/summoned/marauder
ai/boss/darklord/summoned/marauder_wolf
ai/boss/darklord/summoned/painelemental
ai/boss/darklord/summoned/revenant
ai/boss/darklord/summoned/tyrant
ai/boss/darklord/summoned/whiplash