>>jacque+(OP)
The game
Myst was originally written in HC, and a game engine (Mohawk) had to be written for Windows to provide similar functionality in order to port it. There's a documentary about it:
https://youtu.be/EWX5B6cD4_4 Definitely one of the rare indie game success stories. They really poured themselves into making it as awesome and expansive as technology would allow. IIRC, they're still writing games for fun.