http://forums.guildofgreeters.com/index.php?showtopic=15445&pid=238137&st=0&#entry238137
Cyan has released there games on steam. You can buy the complete pack this includes realMYST, Riven: The Sequel to MYST, Cosmic Osmo and the Worlds Beyond the Mackerel, Manhole Masterpiece, Spelunx and the Caves of Mr. Seudo, URU: Complete Chronicles all for only $19.99 as of today date. These might have been on Steam for awhile but I just today decided to check.
It’s nice to know they read outside the GOG once every several months. Oh well, better late than never I guess.