>>718234845
I tried Myst multiple times over the years and got filtered by the obscurity of the marker switches. I played the 3D version for a while until it finally clicked that the tower in the library had hints for the puzzle the beam was pointed at, and blew through it.
I'm stuck at that spot in Riven, and I know it's the big hurdle, because I can't find anything else I can work with until I complete that.