Inferno is the third episode of Doom.
Inferno mainly takes place in Hell, possibly the inner region of Hell, and there is a lot of blood seen in this episode.
- E3M1: Hell Keep
- E3M2: Slough of Despair
- E3M3: Pandemonium
- E3M4: House of Pain
- E3M5: Unholy Cathedral
- E3M6: Mt. Erebus (Exit to secret map)
- E3M7: Gate to Limbo (named Limbo on the automap)
- E3M8: Dis (Spider Mastermind is the boss)
- E3M9: Warrens (Secret map)
This episode introduces one monster:
- Spider Mastermind