Splatoon has outsold any Paper Mario, Metroid, Pikmin, Starfox, and all but 1 Kirby game

[Barkley]

Pyro as Bill said:

Outsold every XB game not called Halo. Switch should fix that.

Edit: Outsold Halo 5/Collection on XB1

Nope, include Digital and Halo 5 is easily above Splatoon, and Halo 5 will have more sales still to come than Splatoon too.