Myst and a similar game, the 7th guest were the "killer apps" of their day forcing computer owners to finally chip in for a CD-ROM drive. Before that, computer game companies really hadn't figured out how to incorporate the added benefit of the CD-ROM into a game. When it was used at all, it was typically to add a few sputtering bit of unattractive video here and there. But Myst changed that, using the extra storage of the CD-ROM to load entire hi-definition (for the era) environments.
I recently tried to play Myst again. It doesn't really hold up that well by modern standards and comes across more as tech demo of what the technology of the day was capable of than an actual game.
That they were. Played both to completion. 7th Guest had a great ending, well, actually, so did Myst. Choose...wisely...