Loading data ...arrow_backAllGroup: J.K. Greye SoftwareMinimizeExpandBritish publisher of the early 1980s, known for pioneering 3D games on the Sinclair ZX81.IN MY 8/16-BIT COLLECTION (2)3D DefenderSinclair ZX81J.K. Greye SoftwareMalcolm EvansSpace combat simulators3D Monster Maze"Color Inlay -version"Sinclair ZX81J.K. Greye SoftwareMalcolm Evans