We're finishing off our December co-op nights with Dungeon Defenders for PC. The event kicks off at 8PM Central on Saturday, December 17th. After all the holiday sales, this game found it's way to most of our Steam libraries, and everyone seems to be enjoying it. If you somehow managed to miss out on those sales, you can still pick it up from Amazon at the regular price of $15, and as an added bonus, you're treated to an Amazon exclusive pet, and $5 credit on downloadable versions of this year's best sellers (including Battlefield 3 and Call of Duty: Modern Warfare 3). Not a bad deal for a quality 8-player co-op game.