It would seem that there is a sizeable audience for Halo on PC.

That's according to a blog post by the head of marketing at publisher Microsoft Aaron Greenberg (pictured), in which the Xbox marketing GM revealed that in the region of three million people have played the recently-released Master Chief Collection on PC and Xbox One during its launch week.

There's no breakdown as to how this breaks down between PC and Xbox One, or how many of this three million figure represents fresh sales or lapsed console users coming back to the Halo compilation following its 2014 release. Oh, and the title is also in Game Pass, so it's possible that a portion of that stat is subscribers. 

The December 3rd release was the title's debut on Steam and the Windows Store, as well as Reach's rollout on PC and Xbox One.

It's not just people playing the game; they're watching it, too. The Big M has said that around three million hours of Halo streams were watched within its release.

This follows Halo: The Master Chief Collection was No.1 on Steam following its launch. The game was also one of the most-played titles on Valve's platform after its release.