nightcraw1er.488: There are several threads on this already! M$ will not sell games here, they have their own store!
Sarafan: Ubisoft has its own store and sells also on Epic and GOG. EA has its own store and sells also on Steam and GOG. Bethesda has its own store and their acquisition by Microsoft didn't stop them to sell on Steam as well. One doesn't exclude the other.
All DRM'd games that are locked to the publisher's client don't really exist outside of that platform as self-contained games. Ubisoft sells a game on Steam that still requires uPlay = it's still a Uplay platform game at its core that simply comes wrapped in a second layer of "digital cellophane" for the cosmetic benefit of Steam gamers demanding "all my games in one place". The "Steam version" (that continues to require uPlay) is really little more than a glorified affiliate selling a glorified shortcut link / library entry to starting the uPlay client to play the game...
Likewise, the newest EA games on GOG are Dragon Age Origins, Mirrors Edge and The Saboteur (all 2009 games), and the newest Ubisoft one is Rayman Origins (2012). There's nothing to say they can't sell anything here, but it's painfully obvious they lost interest in selling newer post 2010 big title games on GOG around the same time-frame as the creation of uPlay & Origin. Far Cry (2004) was here on GOG by 2008 after just 4 years, with Far Cry 2 not far behind, so Far Cry 3 (2012), WatchDogs (2014), etc, should have been here by 2016-2018 based on the same 4 year delay timetable that GOG previously enjoyed with Ubisoft in the 2000's prior to uPlay, and yet here we are in 2022...
As for Microsoft, it was only because the Microsoft Store exclusive "Quantum Break" flopped badly that they begrudgingly went back and released on Steam. And simple remasters of +20-25 year old games like Age of Empires 1-2 HD / Definitive basically mean we won't see those games here on GOG at all (because expensive remasters are more profitable than older classics, so the classics get removed, but we also won't see those remasters here because they've been DRM'd up to the eyeballs (ie, MS Store + Arxan (the MS Store equivalent of Denuvo) = there won't be a DRM-Free version for GOG). As much as some want to paint a picture that
"Microsoft has changed", I believe all these publisher acquisitions probably have far more to do with MS raising a middle finger towards Sony regarding the Xbox vs PS tribal console war p*ssing contest over "exclusives", than it 'enhances choice for PC gamers' (a marketing phrase I recall them once using for Games For Windows Live...)