Gray Design Associates released the Hugo's House of Horrors graphical adventure game series, as well as the 3D shooter Nightmare 3D. Later they would go on to develop jigsaw puzzle games, which seems to be the company's focus today.
Official Gray Design Associates website
Gray Design Associates's Mobygames page
Games developed and/or published by Gray Design Associates
Nitemare 3D (1995)
Hugo III: Jungle of Doom (1992)
Hugo 2: Whodunit? (1991)
Hugo's House of Horrors (1991)
