The main theme in these levels is the Elder World theme. Levels feature more decoration and a better variety of colors than in the previous episodes. As Sandy Peterson designed most of these levels there is a great number of references to H.P. Lovecraft. The general feeling can said to be Lovecraftian as the levels focus primarily on large arcane structures or locales. Many of these maps have mazes deliberately designed for uneasy exploration.
It is the only episode to include the Spawn. This episode included levels that id Software did not know where else to place, typically more difficult ones. Episode 4 is considerably harder than the other three, with even the early levels containing the toughest types of monsters.
The introductory text displayed in the corridor leading to this episode in Introduction reads: "Your worst nightmares come true..." The goal is to search for the Rune of Elder Magic to fight against Shub-Niggurath.
- the Sewage System
- The Tower of Despair
- The Elder God Shrine
- the Palace of Hate
- Hell's Atrium
- the Nameless City (secret level)
- The Pain Maze
- Azure Agony
|Rotfish||7 (14)||23 (46)||24 (48)||The vanilla engine counts each Rotfish as 2 enemies.|
|Fiend||35 (36)||63||92||On Easy skill level a Fiend doesn't spawn on E4M3: The Elder God Shrine.|
|Total||290 (298)||457 (480)||625 (649)|