Just in time for Valentine's Day, Amazon is now offering a special buy two, get one free deal on Xbox 360 Platinum Hits titles. The deal is fairly straightforward: just pop three Platinum Hits games into your cart and the cheapest of the three will be knocked down to the wallet-friendly price of zero dollars. It's really the perfect excuse to pick up some great games you might have missed, especially considering many of them have sequels out this year -- notably Fable II, Halo 3, Fallout 3, Mass Effect, BioShock and Dead Rising. You'd better do it quick though, as the offer is only valid through February 13 and only while supplies last.