Dungeon Master *IS* the reason why I bought my Atari ST. It has to be the greatest game for the ST. I played it so many times.
I created a similar game on my Atari 8-bit called "Dark Caverns". Imagine, 3-D view in Basic! I then did another similar game on my Atari ST called "Escape!" in GFA-Basic. Dungeon Master has been a great inspiration.