written, such as Sentry (1989, MS-DOS), Zenith (2005, Windows freeware), and Augmentinel (2019, Windows freeware). Annwn: The Otherworld (2019) has similar gameplay with a Celtic motif and several changes to user interface and level structure. References External links The Sentinel at BBC Micro Games Archive The Sentinel at Atari Mania Zenith at johnvalentine.co.uk Augmentinel at Simon Owen homepage 1986 video games Amiga games Amstrad CPC games Atari ST games BBC Micro and Acorn Electron games Commodore 64 games DOS games Golden Joystick Award winners Puzzle video games Telecomsoft games Video games about robots Video games scored by David Whittaker Video games scored by Tim Follin Video games developed in the United Kingdom Video games using procedural generation ZX Spectrum games