I first played Dear Esther as the original source mod, some time ago. Today, I replayed it as the full game. Some things have been changed, and generally it looks and sounds so much better. It remains a wonderful and thoughtful experience.
It's not really a game though, is it?
I'm not sure I care though.
The music, the narration, the atmosphere are all perfect. Jessica Curry's music in particular is a highlight for me, and I even bought the album from bandcamp. I bought it last year and have listened to it several times, it really is under appreciated.