There was a video game released in 1987 for the Atari ST called Dungeon Master. It was a dungeon adventure game, but its mix of atmosphere, simple interface, hidden mechanics and real time nature meant it is still loved today.
While FTL Games --the company behind the games-- doesn’t exist anymore, the fan base does, and many exciting projects are still being developed.
The game spread to many other platforms and 4 sequels were released: Chaos Strikes back (using the same original engine), Dungeon Master II: The Legend of Skullkeep (with an updated engine), an adaptation of the original game for the PC Engine / Turbogafx console named Theron’s Quest and one last game named Dungeon Master Nexus on the Sega Saturn console, this time featuring a real 3D environment.