Fantastic game at an amazing price, part of the Steam Holiday Sales.
Deal is only availalbe until 5pm tomorrow (27/12/2009) so grab it while it's there!
Game is the same genre as the Diablo games and brought to you by the team who created Mythos (many also whom originally worked on Diablo II). Required PC specs aren't too demanding either so will work on a lot of laptops and slightly older machines.
84 / 100 from Metacritic - http://www.metacritic.com/games/platforms/pc/torchlight