Nitemare 3D is a shareware 3D first person shooter created by Gray Design Associates and released in 1994. The game is the sequel to Hugo III: Jungle of Doom and it's inspired by Wolfenstein 3D.
3d first-person fps horror shareware shooterHugo II: Whodunit is an adventure game for MS-DOS designed by David P. Gray and released in 1991. Created using the same engine as Hugo's House of Horrors, it was followed by Hugo III: Jungle of Doom which was released in 1992.
adventure detective graphic adventure mystery text parserHugo's House of Horrors is an adventure game developed by Gray Design Associates and published in 1990 for PC MS-DOS. The mechanic resembles Sierra-style adventures (such as King's Quest I: Quest for the Crown).
adventure graphic adventure horror supernatural