The updated versions of Myst and Riven are fantastic. I played them earlier this year, and it was such a great experience.

Also, I know this is outside the normal scope of these posts, but after finishing Riven I read the trilogy of books (The Book of Atrus, The Book of Ti’ana, and The Book of D’ni) that Cyan put out a long time ago, and I highly recommend them for anyone that has any interest in the world and lore of Myst