John M. Phillips‘ Commodore 64 classic translates well to the Atari ST.
Nebulus is a rather tough platform game where the aim is to reach the top of an ever more challenging series of cylindrical towers.
The Atari ST conversion of Ghouls ‘N Ghosts is pretty ugly.
The Commodore 64 conversion of Ghouls ‘N Ghosts is surprisingly good, even though everything in it looks a bit tiny.
An RPG with a funny name, based on the AD&D Forgotten Realms campaign setting, Menzoberranzan is a 1994, first-person, party-based adventure game developed by DreamForge Intertainment for Strategic Simulations Inc.
Released in 1994, Ravenloft: Strahd’s Possession was developed by DreamForge Intertainment for Strategic Simulations Inc. and was distributed by US Gold in the UK.
I remember it well because I reviewed it for PC Player magazine back in the day.
Costa Panayi‘s Revolution was published by U.S. Gold in 1986. It is an isometric puzzle/action game with well-designed, monochrome graphics and a bouncing ball that you control around a series of rooms, levels, and puzzles.
Raid Over Moscow was a controversial release for Access Software in 1984. The game depicts a fictional nuclear war scenario between the USA and Russia and involves US forces fending off nuclear attacks, then flying into the Russian capital to attack what is supposed to be The Kremlin.
Rotox was published by U.S. Gold in 1990. It is an obscure-but-interesting overhead robot shooter, with flat, polygonal platforms suspended over an infinite drop. Which you must of course avoid falling into.