The games from about 1989 onward, including QfG, used a different interpreter (SCI, which was very advanced for its time: an object-oriented VM platform with a complete GUI toolkit, running on top of vanilla DOS, years before Windows 3.0).
The SCI games can be played under ScummVM or DosBox, if you have the original binaries.
It is hard to find games in that same vein anymore. Planescape:Torment and KOTOR came close, but even those are several years old now.
If you haven't played it, I highly recommend "Arcanum: Of Steamworks and Magick Obscura", developed by Troika and published by Sierra in 2001. It's very similar in depth and mechanics to Torment, Fallout, and the other Black Isle RPGs.
http://www.infamous-adventures.com/index.php?page=projects
Still not QFG, I know, just an FYI.
The KQII remake (new animation/storyboard, new story, voice over pack) is probably one of my favorite games of all time.