| onster | Description | Spawn Health | Version |
| ormer Human | Zombie soldier | align="right" | 20 | align="center" | S |
| ormer Human Sergeant | Tougher zombie soldier | align="right" | 30 | align="center" | S |
| a href="/encyclopedia/Imp" title="Imp">Imp | Anthropomorphic hellspawn, hurls fireballs | align="right" | 60 | align="center" | S |
| a href="/encyclopedia/Demon" title="Demon">Demon | Pink, bull-like hellspawn | align="right" | 150 | align="center" | S |
| a href="/encyclopedia/Spectre" title="Spectre">Spectre | Partially invisible bull-like hellspawn | align="right" | 150 | align="center" | S |
| a href="/encyclopedia/Baron-of-Hell" title="Baron of Hell">Baron of Hell | Minotaur-like hellspawn | align="right" | 1000 | align="center" | S |
| a href="/encyclopedia/Lost-Soul" title="Lost Soul">Lost Soul | Flying, flaming skull | align="right" | 100 | align="center" | R |
| a href="/encyclopedia/Cacodemon" title="Cacodemon">Cacodemon | Floating red spheroid, belches fireballs | align="right" | 400 | align="center" | R |
| a href="/encyclopedia/Spider-Mastermind" title="Spider Mastermind">Spider Mastermind | Shoots super-chaingun | align="right" | 3000 | align="center" | R |
| a href="/encyclopedia/Cyberdemon" title="Cyberdemon">Cyberdemon | Fires powerful rockets | align="right" | 4000 | align="center" | R |
| ormer Commando | Shoots chaingun | align="right" | 70 | align="center" | 2 |
| a href="/encyclopedia/Hell-Knight" title="Hell Knight">Hell Knight | Tamer version of the Baron of Hell | align="right" | 500 | align="center" | 2 |
| a href="/encyclopedia/Arachnotron" title="Arachnotron">Arachnotron | Smallish cybernetic spider | align="right" | 500 | align="center" | 2 |
| a href="/encyclopedia/Pain-Elemental" title="Pain Elemental">Pain Elemental | Floating spheroid, belches Lost Souls | align="right" | 400 | align="center" | 2 |
| a href="/encyclopedia/Revenant" title="Revenant">Revenant | Skeleton-like, fires heat-seeking missles | align="right" | 300 | align="center" | 2 |
| a href="/encyclopedia/Mancubus" title="Mancubus">Mancubus | Both arms shoot fireballs | align="right" | 600 | align="center" | 2 |
| a href="/encyclopedia/Arch-Vile" title="Arch-Vile">Arch-Vile | Propels you into the air, resurrects dead monsters | align="right" | 700 | align="center" | 2 |
| a href="/encyclopedia/Wolfenstein-SS" title="Wolfenstein SS">Wolfenstein SS | Nazi SS troops in secret levels | align="right" | 50 | align="center" | 2 |
| a href="/encyclopedia/Boss-Brain" title="Boss Brain">Boss Brain | Final adversary | align="right" | 250 | align="center" | 2 |