*Offer valid from August 27, 2013 until December 31, 2013. Only applicable for exchange of the following Xbox 360 games titles with proof of purchase from Microsoft retail or online stores in United States, Canada or Puerto Rico purchased between the following dates: (i) Madden NFL: purchased between August 27, 2013 and September 26, 2013, (ii) FIFA 14: purchased between September 24, 2013 and October 24, 2013, (iii) Assassins Creed 4: purchased between October 29, 2013 and November 28, 2013, (iv) Battlefield 4: purchased between October 29, 2013 and November 28, 2013, (v) NBA 2k14: purchased between October 1, 2013 and October 31, 2013, (vi) Need for Speed: Rivals: purchased between October 29, 2013 and November 28, 2013, (vii) Call of Duty Ghosts: purchased between November 5, 2013 and December 15, 2013, and (viii) Watch Dogs: purchased between November 19, 2013 and December 19, 2013. No other game titles are eligible for this offer or for exchange. Only valid in Microsoft retail stores in United States, Canada and Puerto Rico. Not valid on prior orders or purchases; cannot be transferred or otherwise redeemed for cash, coupon code, credit or toward the purchase of any other merchandise. Not combinable with other offers. Limit 1 exchange per game title. Offer only valid for the exchange of listed Xbox 360 game titles for the identical Xbox One game titles, no exceptions. Exchange of Xbox 360 version game titles must occur in the same transaction as the purchase of the Xbox One version game titles. Offered discounts must be used in the Microsoft retail stores at the time of trade-in of the Xbox 360 game towards the purchase of the equivalent Xbox One game otherwise offer not valid.