Amazon is having a buy two games and get one free deal on many good games.

Titles include:

The Legend of Zelda: Ocarina of Time 3D
Pokemon – Black Version
Red Dead Redemption
Oblivion 5th Anniversary ed.
Disney Epic Mickey
Battlefield Bad Company 2 Ultimate Edition
Mario Sports Mix
Castlevania: Lords of Shadow

And a whole lot more titles to choose from. All you need to do is just put three games into the cart and the one with the lowest price will be free.