Halo 4 is Top-Selling Microsoft Studios Game of All Time in the U.S. during each respective launch year

[Kresnik]

kowenicki said:

Halo4 has sold more from launch to June 30th 2013 than any other game did to the June following the launch of said game.

This is even more amazing given that information as Halo 3 launched in September and Halo 4 in November,

In a nutshell:

Halo4 has sold more in 7 months than Halo3 sold in 9 months

Thanks for the explanation.  Pretty good result!