NPD Group has released a listing of the top ten best-selling games in the U.S. for the month of April 2015. The results can be found below. 1. Mortal Kombat X (PS4, Xbox One) 2. Grand Theft Auto V (PS4, Xbox One, PC, 360, PS3) 3. Battlefield: Hardline (Xbox One, PS4, 360, PS3, PC) 4. MLB 15: The Show (PS4,...