How to add Microsoft Store games to Steam on Windows 10
https://www.addictivetips.com/windows-tips/add-microsoft-store-games-to-steam-windows-10/
Microsoft Store games on Steam. To add Microsoft Store games on Steam, you need to download and install an app called UWPHook. Run the app and from the list of installed apps, select the game you want to add to Steam. Click the ‘Export selected apps to Steam’ button. If you have Steam running, quit it from the System Tray and then run the app. Open Steam and click Library.
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