There were lots of adventure games on PCs before Myst, where Myst differed was in atmosphere and immersion: it was arguably the first game where you really felt

There were lots of adventure games on PCs before Myst, where Myst differed was in atmosphere and immersion: it was arguably the first game where you really felt like you were in a different world, as opposed to playing something on your computer. I think that's why it is lodged so deep in collective memory.