I have no idea how could I overlook it for so long: The Endless Forestis a (non)game from Tale of Tales that is not only highly original (just check out their list of game verbs!), but also beatiful.
From their website:
"The Endless Forest is a multiplayer online game and social screensaver, a virtual place where you can play with your friends. When your computer goes to sleep you appear as a deer in this magical place. There are no goals to achieve or rules to follow. Just run through the forest and see what happens. (Emphasis mine)"
(What about my emphasis?)
When your computer... Endless Forest is a screensaver - which is a brilliant idea, I think.
There are no goals to achieve... See? It is a nongame, I was not pushing too far.
More from their website:
"You are a deer. So are the other players. You meet each other in an endless forest on the internet. The setting is idyllic, the atmosphere peaceful. You communicate with one another through sounds and body language."
This could be very interesting. And I wonder if it wouldn't work even better within a goal-driven context.
Well, for those who are interested, here's the download page.