Stalking the 'Net Fantastic

From Shacknews' review of Portal (emphasis mine):

"Whichever version you play, you're going to be impressed again by Valve's commitment to innovation--not to mention the game's ending sequence, which I have no reservations in saying features the greatest original musical composition--courtesy of Jonathan Coulton--ever included in a video game to date. The song is equal parts triumphant, humorous, and enjoyable--a fitting end to a game summed up by all three."