This site only offers games released under Sierra's older game interpreter (AGI). The games from about 1989 onward, including QfG, used a different interpreter

This site only offers games released under Sierra's older game interpreter (AGI). 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.