Quick answer: The Unifideck Decky Loader plugin now syncs your Xbox Game Pass library with your Microsoft login and can download Game Pass PC games to play locally on Steam Deck, using its own Xodus runtime and backend.
Unifideck, the Decky Loader plugin that pulls games from other stores into your Steam Deck library, can now recognize Xbox Game Pass games and download them to play locally. Steam Deck HQ tried out the new update.
The plugin is made by mubaraknumann, and Steam Deck HQ notes it was built with AI assistance. The Xbox support is based on the Xodus project started by imLinguin and Vidi0. mubaraknumann made his own Xodus runtime and backend, which uses your existing Microsoft login to check which Game Pass plan you have and sync your library. Because the Xodus parts are separate, they can be updated to support more games without reinstalling the plugin.
If you already signed in to use Xbox Cloud Gaming through Unifideck, you don't need to log in again. There's also a fallback for people in countries without Xbox Cloud streaming, so they can still download their games. Where cloud streaming is available, you can pick between streaming and downloading. The games show up under the Microsoft tab of your non-Steam games, and the plugin checks your license before a download starts.
Not everything works yet. Steam Deck HQ found a few games that won't run at all right now, but said most do and run pretty decently. Classic Xbox games, including Crimson Skies, started working during its testing after it reported them to the developer.
The update also brings UI changes, achievement popups for Epic Games, GOG and Xbox, a version picker for Battle.net games, working cloud saves for Linux GOG games, and Steam review scores and tags on game pages.
Tested on the channel: How to Make SteamOS Better on the Legion Go 2 with Decky Loader (video) · full article