Doesn't seem like it.. Halo, Gears of War 5, Flight Simulator 2020.. those are all on Steam as well as the Microsoft store. It does require you to login after l

Doesn't seem like it.. Halo, Gears of War 5, Flight Simulator 2020.. those are all on Steam as well as the Microsoft store. It does require you to login after launching those titles on Steam but it's all contained with-in the game, and apparently with a small enough amount of crazy middleware that you can even play Halo The Master Chief Collection under Linux using Proton. I think Microsoft is very much aware that trying to keep major games like these exclusive to the Microsoft store isn't a great idea, a lot of people never open, let alone use it.