Unifideck - Unified Game Library for Steam Deck

A Decky Loader plugin that brings together Steam, Epic Games Store, GOG, Amazon Games, Ubisoft Connect, Battle.net, GameVault, itch.io, and Xbox Cloud Gaming in a single library experience on your Steam Deck.

Table of Contents

• Features
• Screenshots
• Prerequisites
• Installation
• Getting Started
• Documentation
• Known Limitations
• Troubleshooting
• Languages
• Building
• Tech Stack
• Credits
• Support
• License
• Author
• Disclaimer

Features

Unifideck brings your games from other stores into Steam, so they show up in your library and play just like Steam games — same Play button, same Gaming Mode, same controller-friendly feel. No switching to desktop mode, no juggling separate launchers.

• All your games in one place — Your Epic, GOG, Amazon, Ubisoft, Battle.net, GameVault, itch.io, and Xbox titles sit right alongside your Steam library, in tabs you can browse like any other.
• Install and play like a Steam game — Press Install, watch the progress, then press Play — all from the game's page in Gaming Mode, exactly the way Steam games work.
• Install games wherever you like — Internal storage, an SD card, or a folder you pick yourself.
• Proton handled for you — Most Windows games just work; Unifideck sets up a recent Proton automatically. If a game is picky, you can force a specific version from Steam's usual Compatibility menu.
• Cover art and real game info — Cover images, icons, Metacritic scores, and Steam Deck compatibility ratings, so your non-Steam games look like they belong.
• Cloud saves for Epic and GOG — Your progress syncs with the store's cloud and follows you between devices, with a heads-up if your local and cloud copies ever disagree.

Screenshots

Unified Game Library

Game Details

Prerequisites

• Decky Loader must be installed on your Steam Deck.
• Microsoft Edge is required for store sign-in and Xbox Cloud Gaming. If it is missing, Unifideck will prompt you to install it.
• All other store CLIs and helper tooling are bundled with the plugin.

Decky Loader Installation Guide

Installation

1. Download the latest plugin ZIP from the Releases page.
2. Open Quick Access Menu (three dots button).
3. Navigate to Decky -> Settings (gear icon).
4. Enable Developer Mode if it is not already enabled.
5. Click Install Plugin from ZIP.
6. Select the downloaded ZIP file.

If an update gets stuck on installing plugin, uninstall the current Unifideck plugin and install the latest ZIP again.

https://www.youtube.com/watch?v=lP-90uYd72w

Getting Started

1. Open the Quick Access Menu and launch Unifideck.
2. Connect the stores you want to use.
3. Set your default install location if you want internal storage, SD card, or a custom path.
4. Run Sync Libraries or Force Sync.
5. Restart Steam when prompted so new shortcuts and artwork are applied.
6. For Ubisoft titles purchased through Epic, complete the one-time account link at epicgames.com/id/link/ubisoft.

Installed games are playable immediately after install. The Steam restart is still needed after sync or cleanup so the library refreshes fully.

Documentation

User guides

• FAQ - Common issues, workarounds, and version-specific fixes collected from releases, code comments, and GitHub issues.
• Launch Options - Environment-variable tweaks, what's supported, and what's planned.
• Proton Compatibility - Choosing a Proton version and troubleshooting/quick fixes.
• Cloud Saves - How Epic/GOG cloud sync works, conflict handling, and custom save paths.
• Microsoft / xCloud - Xbox Game Pass and cloud-streaming integration.
• GameVault Setup - Connecting your own GameVault server, or a local folder of game archives.

Developer / reference

• Architecture & Build - The layered backend, EventBus, RPC mixins, and build flow.
• Ubisoft Store Spec - How the Ubisoft Connect integration works end to end.
• UI Injection & Steam UI Patching Reference - How Unifideck patches Steam's React UI.
• CONTRIBUTING - PR process and contribution guidelines.

Known Limitations

• Unifideck replaces Steam's default All Games, Installed, and Great on Deck tabs, so some sort and filter behavior is not preserved.
• With TabMaster installed, Unifideck skips custom tab injection and relies on [Unifideck] collections instead.
• Steam still needs a restart after sync or cleanup so new shortcuts and artwork fully apply.
• Xbox Cloud Gaming support is streaming-only and depends on Microsoft Edge.
• Cloud saves currently cover Epic and GOG only, and game-level support varies.
• Some titles still need manual Proton experimentation or store-specific workarounds.
• Proton version and launch options are configured through Steam's native shortcut Properties (Compatibility tab / Launch Options field) — there is no in-plugin picker. Wrapper-style launch options and LSFG are not yet wired up; see the Launch Options guide.
• Not every game has SteamGridDB artwork or complete metadata.
• For Ubisoft, choose your Proton version before installing. Changing Proton after install can invalidate the prefix and force a reinstall. See the Ubisoft store spec for details.

Troubleshooting

For a longer list of release-specific problems and fixes, see the FAQ.

Install Stuck on installing plugin

Uninstall the current plugin and install the latest ZIP again. This was the recommended workaround for the 0.6.0 -> 0.6.1 transition.

Games or Artwork Do Not Appear After Sync

Run Force Sync if needed, then restart Steam when prompted so shortcuts and artwork are reloaded.

Epic Login Shows a Blank Page or Pretty Print

Sign into Epic in a regular browser first, accept any pending legal updates, then retry in Unifideck.

A Game Will Not Install or Launch

Check available storage, make sure the store account is still connected, and inspect ~/.local/share/unifideck/launcher.log.

Microsoft / xCloud Will Not Open

Install Microsoft Edge when prompted. After the first successful Microsoft sign-in, you may still need to click Play via Cloud once inside the xCloud home screen to finish OAuth.

Ubisoft Titles from Epic Hang on Login or Ask for a Key

Make sure your Epic and Ubisoft accounts are linked at epicgames.com/id/link/ubisoft. If problems continue, clear ~/.local/share/unifideck/chromium-auth, ~/.local/share/unifideck/ubisoft_installer_cache, and the Ubisoft prefixes under ~/.local/share/unifideck/prefixes/, then try again.

Logs

The easiest way to get logs is Settings -> Capture Logs in the Unifideck Quick Access panel. One tap collects every log and state file, adds a report describing your device and where everything lives, and writes a single zip to your Downloads folder. Attach that file to your bug report. It never contains your passwords, store login tokens, or browser cookies.

Individual locations, if you need them directly:

• Decky/backend log - ~/homebrew/logs/Unifideck/ (one file per plugin session)
• Per-launch logs - ~/.local/share/unifideck/launches/<id>.log (plugin side) and <id>.game.log (Proton/game output)
• Library sync activity - ~/.local/share/unifideck/sync_activity.log
• Edge/browser sign-in log - ~/.local/share/unifideck/edge-auth.log

Languages

Unifideck currently ships with English (US), French, Brazilian Portuguese, Russian, Japanese, German, Spanish, Italian, Simplified Chinese, Korean, Dutch, Polish, Turkish, and Ukrainian.

To add a new language, create a JSON file in src/i18n/locales/ using en-US.json as the template and wire it into the language selector.

Building

To build the plugin from source:

1. Install dependencies: pnpm install
2. Build a release ZIP: ./build-plugin.sh prod — produces a versioned plugin ZIP in out/.

Common flows (build-plugin.sh):

• ./build-plugin.sh prod install - build, install into Decky, and restart it.
• ./build-plugin.sh dev / ./build-plugin.sh dev install - development build (build number auto-incremented).
• ./build-plugin.sh dev quick-install - fast rsync of backend/config to the live install, no full repackage (run pnpm run build first if you changed the frontend).
• pnpm run build / pnpm run watch - frontend bundle only.

Tests & checks: npm run test:all (backend + frontend), npm run test:backend, npm run test:coverage, npm run typecheck, npm run lint.

Tech Stack

• Frontend - React, TypeScript, Rollup, @decky/api, @decky/ui, i18next
• Backend - Python, Decky Loader RPC, a layered architecture with an EventBus and dependency-injection core, CDP-based auth and browser helpers
• Store tooling - legendary, gogdl, nile, comet, butler, winetricks, umu-launcher
• Services and data - SteamGridDB, Epic/GOG/Amazon/Microsoft/itch.io APIs, self-hosted GameVault servers, Microsoft Edge, Metacritic, compatibility metadata

Credits

This project builds on a lot of open source work and community help.

• Platform and UI - Decky Loader, @decky/api, @decky/ui, and the SteamDeckHomebrew community
• Store and runtime tooling - legendary, gogdl, nile, comet, winetricks, umu-launcher, and SteamGridDB
• Reference projects and patterns - TabMaster, SteamGridDB Decky, ProtonDB Decky, Heroic Games Launcher, and Junk-Store
• Special thanks - @src893, @xXJSONDeruloXx, @moi952, @Lazer-zx5, @buddax2, @Grails125, @clach04, @kevbenjam, @kmturley, @FreudsCAT, @frank460699, @matheussilva421, @stm85, @EricwanAR, @HSNEM, @uglierwan, @HoLuLuLu, DeckWizard, sufi0511, _badbug, lutianxing, mmmtimmah, u/EnTei7K, u/IN50MNIAC, derrod, and the Discord testers for invaluable feedback.

Support

If you want to support development or keep up with releases:

• Become a GitHub Sponsor
• Buy me a coffee on Ko-fi
• Join the Discord

License

GNU General Public License v3.0 or later - see LICENSE for details.

Author

Numan Mubarak (numanmuabrak@protonmail.com)

Disclaimer

This is an unofficial third-party tool. It is not affiliated with Valve, Epic Games, CD Projekt / GOG, Amazon, Ubisoft, Blizzard Entertainment, GameVault, itch corp, or Microsoft.