So I've mentioned a couple of times how much I like Delta Green, and how I'll buy anything released for it sight unseen. Well now it's your turn to try one of the best RPGs ever created. Technically it's a supplement for the Call of Cthulhu RPG so you'll need those rules to play it, but it's so worth it.
Head on over to Bundle of Holding for the next 4 days only to get the entirety of the Delta Green RPG line, plus some of the fiction, for only $22 in PDF format. Worth every last cent.