Bloodwych. Completely forgot about this gem from way back in 1989.
While sometimes considered a Dungeon Master clone, I remember Bloodwych being far more playable.
The two persons on one machine mode was great fun too!
As for the earlier Amiga versus ST debates: the distinguishing thing about the ST was the digital TTL mono monitor. Which almost gave it split personality as all the games would only run in ST Low.
An Atari ST + SM124 was very much a far cheaper Mac Plus in its biggest serious market, Germany. That's where most of the big productive programs came from. Atari's American market was almost nothing, yet they concentrate so much on it including buying a national retailer to try and sell their stuff and that almost bankrupted then.
Even more so than the Amiga, Atari never really got around to upgrading or offering newer models. In the PC era that's hard to imagine but from 1985 to around 1990 both the Atari ST 520/1040 and the Amiga 500 were almost unchanged.