World of Goo is a physics based puzzle / construction game. The millions of Goo Balls who live in the beautiful World of Goo don't know that they are in a game, or that they are extremely delicious.
From the archive:
"We are on the cusp of perfection of extreme evil -- an evil whose possibility spreads well beyond weapons of mass destruction," Joy warned recently in Wired magazine.
You must learn to love the Goo, for it loves you.
I wait in eager anticipation of Grey Goo Graffiti.
Only you can prevent Gray Goo
World of Goo