World of Goo!
I'm surprised no one has made a thread about this yet.
This game is awesome.
(demo to be found
here)
Before I wasn't honestly that fussed about the game having played the
Tower of Goo experiment that this was originally based on. I mean, it was a fun idea, but I didn't see how they were going to much expand on that...
Above rantings of Rock Paper Shotgun won me over though, and I'm glad I tried it. One of the most wonderfully unique puzzle games I've had the pleasure of playing in, well,
ever.