Capstone Software, founded in 1984 and out of business in 1996, developed and published games such as Corridor 7: Alien Invasion, William Shatner's TekWar and Witchaven. Most were mediocre at best.
Official Capstone Software website
Capstone Software's Mobygames page
Capstone Software's Wikipedia page
Games developed and/or published by Capstone Software
William Shatner's Tekwar (1995)
Corridor 7: Alien Invasion (1994)
Operation Body Count (1994)