I have been waiting for this..

Dear Esther is available as part of a HumbleBundle for Windows, Mac and - currently as a WINE package, but soon native - Linux. This means you can pay anything you like for it, choose to donate some or all to charity... and get assorted bonuses like the soundtrack.

The WP page has spoilers, but the intro gives the basic appeal:

The game does not follow traditional video game conventions, as it involves minimal interaction from the player and does not require choices to be made nor tasks to be completed. It instead places focus on its story, which is told through a fragmented, epistolary narrative as the player explores an unnamed island in the Hebrides.

I paid enough to get all of the other games as Proteus looks interesting.