That means that they are buying out I.D. software, Bethesda, Arkane, etc. See this gamespot article for details. BTW did you know that MS already owns GitHub too?
You might also find this page on Bethesda’s site of interest (hint Fallout TV Series).
I’ve lost count of the number of products that Microsoft has forcibly withdrawn - not just games, which every major update of Win10 searches and destroys, but also my e-mail client, movie maker and goodness knows what else.
So much as I liked Skyrim etc I don’t think I’ll be buying any more of their games any time soon!
I still remember the pigs’ breakfast Microsoft made of Project Spark !!