Microsoft is offering through Xbox Live Rewards programme a $50 discount for Xbox One consoles, along with a choice of one free game.
You can choose between two console options: the Assassin’s Creed Unity Xbox One bundle or the standard Kinect-less console. Regarding the free games you can choose one between: Titanfall, Madden NFL 15, Call of Duty: Ghosts and Battlefield 4. [I would say Titanfall is the right pick]
To get this deal you must be an Xbox Live Rewards member and if you aren’t one, you can sign up for that through here.More details about this promotion are over the Microsoft Store website.