Can Halo 5: Guardians Hit 12Mil Lifetime in Sales? (or At Least 10mi!?)

[Barozi]

Robert_Downey_Jr. said:
Only 1 Halo has ever reached 10m so I'm gonna say, with the smaller install base...8m

well check my post, the smaller install base can't be the reason. The X1 also sold more than the 360 during the same time so far.