A bit late in coming, but I must agree that there is virtually nothing bad you could possibly say about the game Portal. Though I suppose some people might, MIGHT want to ***** about the whole "homicidal AI uses you as their personal guinea pig in an environment subtly caked over with the corpses of the scientists who made the AI" trope, plot thing. Valid enough as it stands, the way it's used in the game itself is so twisted, hysterical and absolutely wicked in it's dark humor that the "plot-clone" turns out to be a rather tasteful, if not downright cheeky and clever child. A girl at that!
And oh, I L-O-V-E the song "Still Alive". That little b*tch just doesn't know when to quit.