The game my brother Andrew Williams produced for xbox live arcade that's coming out on wednesday, "Limbo." Is getting great reviews.
Destructoid "Score: 10 -- Flawless Victory (10s are as close to perfect as you will get in a genre or on a platform. Pure, untarnished videogame ecstasy."
http://www.destructoid.com/review-limbo-179246.phtml for full review
http://www.metacritic.com/games/platforms/xbox360/limbo
Metacritic has averaged it at a 92 so far and it's gotten into the top 20 XBOX games of all time, right up there with Braid, Bioshock, Gears of War 2, and many others.
I can't wait 'til wednesday to play what will probably be one of my favorite puzzle games right up there with the Myst series.