I heard about this at RedFlagDeals.com. They link to 1Up.com:
You don’t care how you get your fix. You just want to play a new game right now and you don’t want to pay a lot for the privilege. Thank God for the Internet, where everything (and its mom) is available for free. So, taking a break from downloading patches and porn, we set upon a journey to gaming-freebie Mecca.