NPD Group has released a listing of the top ten best-selling games in the U.S. for the month of December 2014. The results can be found below. Call of Duty: Advanced Warfare (Xbox 360, Xbox One, PS4, PS3, PC) Grand Theft Auto V (Xbox One, PS4, Xbox 360, PS3) Madden NFL 15 (Xbox 360, Xbox One, PS4, PS3) Super Smash...