To be specific, Alpha Dog, Arkane, Bethesda (both Game Studios and Softworks), id Software, MachineGames, Roundhouse Studios, Tango Gameworks, and Zenimax Online Studios are all mentioned as being part of the deal.
Microsoft confirmed the deal in a blog post on Monday, writing that its Xbox division and Bethesda "have a close and storied history working together". The new Game Pass Ultimate plan ($15/month) covers console, PC and Android titles and includes EA Play for free, bringing in titles like Titanfall 2, Federation Internationale de Football Association 20, Battlefield and more.
On the other hand, the future of Bethesda's games on platforms outside of the Xbox ecosystem is a lot vaguer, with Spencer mentioning that upcoming releases like Starfield will launch on Xbox, PC, and Game Pass. Long story short? Microsoft now owns Skyrim, and the next Elder Scrolls game and more will be Xbox exclusives and featured on Xbox Game Pass from day one. Fallout: New Vegas was a Fallout game published by Bethesda, but developed by Obsidian (itself purchased by Microsoft in 2018).
Todd Howard also shared his excitement about this surprising acquisition, revealing that he can't think of a better group of people to work with than the ones at Xbox, which even include Xbox head honcho Phil Spencer.
PlayStation fanboys like to say the Xbox doesn't have enough exclusive games. And once it's set up, you can use the app to install any game to your console, manage your game library to free up space, or as a remote control.
(1) Incidentally, if you're wondering where Nintendo Co. fits into all of this, its systems and collection of two-player-or-more games appeal more to casual users. "Microsoft is an incredible partner and offers access to resources that will make us a better publisher and developer".
This all serves as a big move for Microsoft Game Studios, which has continuously expanded in recent years. On Game Pass for PC, you can now play Fallout 76 and Wolfenstein: Youngblood.