If you are into old school adventure point and click style games such as the King's Quest series, this game will not disappoint. I purchased this game for 10$ from http://machinarium.net/blog/2009/12/16/amanita-design-christmas-pack-machinarium-samorost2-for-10-60-off/for a couple more days, it comes included with another adventure game from the same company called Samorost2 which I have not played yet. It took me about 6 hours to get through Machinarium and I enjoyed every minute, although it can be very challenging at times. Please, if you are at all interested in these types of games, give this a purchase and support an indie company that deserves your money.

edit: Also, it runs on almost any PC, mostly hand drawn 2D (awesome art **** with some light animation from the characters. And it comes with the soundtrack, which to me was unique and refreshing, I have it on my MP3 player!