This game is frankly just amazing. Its available thru steam for a mere $9.99, and of course there is a free demo. I played this demo once and was immediately hooked.
http://www.audio-surf.com/
Its a simple concept applied brilliantly. They've taken the ability to get all of your songs on your computer, and turn them into racetracks where you drive along and collect various colored blocks. As your songs speed up, or change direction, so does the course.
Really a fantastic game, and I highly recommend giving the demo a try. It doesn't cost a dime, and the system stats for it are quite low. I can run it fine on a midrange laptop without issue.



--- Catch me on Xbox Live