DarkStar is a map set for shareware Wolfenstein, made by Darkstar. It was released on August 19, 1993.
The map set features a number of different designs, taking a lot of liberties in terms of spaciousness, with large, sparsely decorated rooms along with small and compact sections with different walls and atmospheres.
The map set was available via BBS early on and figured on many early Wolfenstein download sites.
Being a map set, it is playable in SDL.