What are the best ambient games?

Endless Ocean, Flower, and Journey are the best, in my opinion, but not one of them is available for PC. I own the three you have, but I'm not sure they classify as "ambient games." To me, ambient games are things like Proteus or Child of Eden.

(And no, I'm still not going to buy a fricking console.)

Proteus is pretty swell too

Skyrim - forget the real world and just explore the world and then realize its the next morning. :D

inb4 "You don't know what ambient is" :P

Undergarden :) great game with great sounds :)

Planescape Torment

PixelJunk Eden is a good one

Thanks for the responses all! Pixeljunk Eden is one that I'll add to my list ;)