Rez

I sought this game for a bit, but 90 someodd bucks was too much for a ps2 game. Now on XBox live for 10 bucks. Really? The whole experience is great, on the level of Portal, in that it's short, but you need to really run the course of the artwork to get the full experience. Fully worth the 10 bucks and handful of hours of gameplay to run through its 5 levels. Great, arty, compelling achievement of a game. Bonus levels seem fun so far too.