I used to have an Atari many years ago, they were in rival with the Commodore 64 and ZX Spectrum for a good few years, but sadly, all became obselete over time. As soon as the ST was released about 1988, the 8-bit machines just faded away as people went after the next best thing on the market.
Sure I remember saying it, but there was a game called QUESTRON released around 1984, and it was very similar to what Knightmare was to become, different landscapes and scenarios, dungeons in later levels, an array of weird and wonderful creatures, good and bad, spell casting, you name it, they had it. Spent many an hour years ago playing this, but there was a bug in the game I had where near the very end, the game crashed and you could do no further. But it was great fun for a time, look on Wikipedia 'Questron' for more information. I'm probably the only here who ever played it though.