A special level has some unusual features that differ from the normal dungeon-, mine-, or maze-style levels. Usually some parts of these levels are not randomly generated. The special levels are made with a special programming language, which is then compiled into a .des -file by lev_comp. NetHack loads the .des-file when needed and creates the special level based on the instructions in it.
- The Dungeons of Doom (branch)
- Gehennom (branch)
- Mazes of Menace, containing a map of the above levels