Quite possible the hardest F*#$in' free game in the world! [Recommended]

This is a free game called Spelunky, It is horrifically fun, annoying, and addicting. You can be sure about the death rate being really high in this game, but once you play it, you'll be hooked. The levels are never the same, quite literally, most likely because everytime you play on a level, the environment completely CHANGES. I'd have to give this free game a 10/10 for the fact that it is fun to play, addicting, and well thought out. Also, it is moving into the Xbox Live Arcade section, and it will most likely be free there as well.

http://www.spelunkyworld.com/