passage
I was strangely moved by the odd little game Passage. It's an abstract little game about life, death and partnership, written by a guy named Jason Rohrer.
What I find amazing is that one would write such a game, and then, as he says on his about page... not show it to his wife!
You can do a fair amount of exploration in the game, but it ends after five minutes... when you die of old age.
I love games that are abstract and primarily allow for exploration. Probably the most amazing to date is Knytt. I never quite got the last piece in Knytt, so I never "won". I did get to explore a beautiful world and hear some cool music though. It's nice to go be Knytt for awhile. In writing this blog post I just realized there was a sequel. Ooooh.