A community fork of Junk-Store — an open and extensible multi-store game launcher for Steam Deck.
GameVault lets you access non-Steam games directly from Game Mode. No Desktop Mode required.
Built on the Junk-Store framework, this fork adds community-built store integrations and quality-of-life features on top of the original Epic Games support.
| Store | Backend | Origin |
|---|---|---|
| Epic Games | Legendary | Original (upstream) |
| GOG | gogdl | Community extension |
| Amazon Games | Nile | Community extension |
| itch.io | itch.io API | Community extension |
The official Junk-Store project offers its own GOG integration via Patreon or Ko-fi. The GOG extension in this fork is a separate, independently-built implementation. If you want the officially supported GOG experience, consider supporting the original project.
- Epic Games — Works out of the box. Log in from the plugin.
- GOG — Install dependencies from the About menu before use. Requires a keyboard to paste the redirect URL during login.
- Amazon Games — Install dependencies from the About menu before use. Requires a keyboard to paste the redirect URL during login.
- itch.io — Log in with your itch.io API key. Access your purchased and claimed games.
These features are part of the upstream framework that GameVault is built on:
- Epic Games Store — Full integration via Legendary (install, update, verify, repair)
- EOS Overlay Management — Install, update, and remove the Epic Online Services overlay
- Per-Game Launch Configuration — Proton version selection, environment variables, FPS limiting, FSR, ESYNC/FSYNC toggles via the QAM
- Platform Config Editor — Edit game INI/config files directly from Game Mode
- Executable Runner — Run executables (EXE, BAT, MSI) from game install folders
- Protontricks Integration — Launch Proton Tricks GUI for manual Proton fixes
- UMU ID Management — Update UMU IDs for compatibility tracking
- Registry Fix — Apply Windows registry fixes via Proton (Epic)
- Dependency Installer — One-click install for Proton EasyAntiCheat Runtime and BattlEye Runtime
- Import/Move Games — Manage game storage locations
- Custom Backend Support — Extensible architecture for community store scripts
- Developer Mode — Toggle developer tools and log viewer
- Achievements — Hidden unlockable achievements
These features were added by the community fork:
- GOG Store Extension — Full game management, browser-based login, cloud save sync
- Amazon Games Extension — Full game management via Nile backend
- itch.io Extension — Access purchased and claimed games via API key
- SteamGridDB Artwork Fallback — Automatically fills missing game artwork from SteamGridDB. Set your API key in any store's tab config (gear icon). Images are cached for one-time lookup per game.
- Cloud Save Sync (Epic & GOG) — Upload and download save files, with per-game auto-sync toggle
- GE-Proton Installer — One-click download and install of the latest GE-Proton from the Dependencies tab
- Proton Fixes Lookup — Look up known fixes for any installed game from the umu-protonfixes database. Falls back to Steam fixes via UMU ID when store-specific fixes aren't available.
- Auto-Apply Proton Fixes — One-click button to automatically apply known environment variable fixes to a game's launch configuration
- Storage Management — View total disk usage across all stores, per-store breakdown, free disk space, and installed games sorted by size from the About page's Storage tab
- Batch Install Queue — Select multiple games from a store grid and queue them for sequential download and installation
- Game Update Detection — Automatically checks for available updates when viewing an installed game (Epic, GOG, Amazon). Shows an "Update Available" indicator on the play button.
- Improved GOG Uninstall — Properly cleans up gogdl manifest state so games can be reinstalled without manual intervention
- Download the latest release zip from the Releases page
- Transfer to your Steam Deck
- Extract to
~/homebrew/plugins/GameVault/ - Restart Decky Loader
- Junk-Store by Eben Bruyns
- Eben Bruyns (junkrunner) - Software Sorcerer
- Annie Ryan (mrs junkrunner) - Order Oracle
- Jesse Bofill - Visual Virtuoso
- Tech - Glitch Gladiator
- Logan (Beebles) - UI Developer
- Starkka15 - GOG, Amazon, itch.io extensions, cloud save sync, SteamGridDB integration, GE-Proton installer, protonfixes lookup/apply, storage management, batch install queue, update detection
- Original project: github.com/ebenbruyns/junkstore
- Official Junk-Store Discord:
