Unifideck - Unified Game Library for Steam Deck

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

Downloads

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

Features

Unified library tabs - Browse Steam, Epic, GOG, Amazon, Ubisoft, Xbox Cloud Gaming, Installed, Great on Deck, and Non-Steam from one place.
Steam-native install, update, and launch actions - Manage supported games directly from the game details view, with progress and status feedback.
Shortcut-based sign-in in Gaming Mode - Authenticate Epic, GOG, Amazon, Ubisoft, and Microsoft without leaving the Steam UI.
Flexible install locations - Use internal storage, SD card, or a validated custom install directory.
Launch options and Proton control - Preserve custom launch options across syncs, installs, and Proton toggles. Supports wrappers, MangoHud, LSFG, PROTON=, and PROTONPATH=.
Artwork and richer metadata - Pull cover art, icons, banners, store links, Metacritic data, and Great on Deck style compatibility info where available.
Cloud saves - Epic and GOG cloud saves are supported, including conflict prompts when both local and cloud saves exist.
Store-specific extras - GOG language selection, Epic/GOG DLC auto-downloads, Epic offline mode, GOG Galaxy / Comet support for compatible titles, and xCloud "Play on Cloud" support through Edge.

Screenshots

Unified Game Library

Game Details

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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

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

Open the Quick Access Menu and launch Unifideck.
Connect the stores you want to use.
Set your default install location if you want internal storage, SD card, or a custom path.
Run Sync Libraries or Force Sync.
Restart Steam when prompted so new shortcuts and artwork are applied.
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

FAQ - Common issues, workarounds, and version-specific fixes collected from releases, code comments, and GitHub issues.
Launch Options Guide - Custom parameters, wrappers, LSFG, and per-game launch tweaks.
Proton Compatibility Notes - PROTON=, PROTONPATH=, and compatibility troubleshooting.

Known Limitations

Unifideck replaces Steam's default All Games, Installed, and Great on Deck tabs, so Steam's standard sort and filter behavior is not preserved there.
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.
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.

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.

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

Decky/backend log - /home/deck/homebrew/logs/Unifideck
Launcher/runtime log - ~/.local/share/unifideck/launcher.log
Edge/browser log - ~/.local/share/unifideck/chromium-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:

Install dependencies: pnpm install
Build the frontend bundle: pnpm run build
Build the plugin package:
- standard Decky / fork workflow: ./.vscode/build.sh or the VS Code build-plugin task

For frontend watch mode, use pnpm run watch.

Tech Stack

Frontend - React, TypeScript, Rollup, @decky/api, @decky/ui, i18next
Backend - Python, Decky Loader RPC, CDP-based auth and browser helpers
Store tooling - legendary, gogdl, nile, comet, winetricks, umu-launcher
Services and data - SteamGridDB, Epic/GOG/Amazon/Microsoft APIs, 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, DeckWizard, u/EnTei7K, u/IN50MNIAC, derrod, and the Discord testers for invaluable feedback.