Just finished Dear Esther. Not 100% sure what it was even all about (or whether it should be called a game for that matter), but I still really enjoyed it. Supposedly the narration changes when you start the game over, peeling back the layers of mystery in the process. I'm very much looking forward to that.
Really worth checking out unless deliberately artsy takes on the medium appall you. Never knew the Source Engine could look this stunning.
Crap. I think you just forced me to spend $10.