The key that opens every store. Play your Epic Games, GOG and Amazon Games libraries directly from Game Mode on SteamOS / Bazzite — login, install, launch. No desktop mode needed.
- 🎮 100% Game Mode — browse, log in, install and play without ever touching the desktop
- 🏪 Four stores, free — Epic Games (Legendary), GOG (gogdl), Amazon Games (nile) and miHoYo/HoYoverse
- ✨ miHoYo store — Genshin Impact, Honkai: Star Rail, Zenless Zone Zero and Honkai Impact 3rd, installed from HoYoverse's official sophon channel: parallel chunk downloads (~100 MB/s), updates that only fetch changed files, resume after reboot, anti-cheat handled automatically (jadeite) for HI3/HSR
- 🩹 miHoYo extras — delta updates (download only the diff, ~4× smaller), voice-over language picker, integrity check & repair, and Zenless Zone Zero anti-cheat handled automatically
- 🏛️ Classics Reborn — 52 open-source native ports & recompilations of classics (Zelda, Mario 64, Perfect Dark, Diablo, Fallout, Doom, C&C Generals, Morrowind, Sonic Unleashed, Unreal Tournament, Freespace 2, LEGO Island…), installed from each project's official releases, with clear instructions for your original game files (9 languages)
- ⛏️ Minecraft — Java Edition (through Prism Launcher, pre-configured: sign in with your Microsoft account and play), Bedrock Edition (through mcpelauncher from Flathub, native controller support) and Modrinth modpacks as one-click Steam shortcuts (live search, version pinning or daily auto-updates, automatic world backups before every version change)
- 🎯 Battle.net & Ubisoft Connect (experimental) — the official Windows clients run in one shared Proton prefix each: log in once, your owned games appear in SkullKey, Install opens the client on the game's page (one press to confirm), Play starts the game directly and closes the client when you quit
- 👥 One store space per Steam account (multi-account) — every Steam user of the machine gets their own Epic/GOG/Amazon logins and library; switching the Steam account switches everything automatically (existing logins are kept by the account active at first run)
- 📦 Games auto-update — a daily background pass keeps every installed game current, on every store and for every account
- 💾 Save backup & restore — back up a game's progression from its page in one action (via ludusavi, auto-provisioned) and restore it on demand — Epic, GOG and Amazon games, backups in
~/.local/share/skullkey-saves - 📺 Media & apps — extra sections for TV & Video, Music, Cloud Gaming and Apps & Tools (Netflix, Jellyfin, Kodi, Moonlight, Lutris… 34 curated apps), auto-kept up to date
- 🖼️ Native-looking shortcuts — installed games automatically get Steam's official artwork (vertical capsule, hero, logo), with GOG's gamesdb as fallback
- 📚 Steam collections — installed games are grouped per store ("Epic", "GOG", "Amazon") in your library
- ⚙️ Proton handled by Steam — prefixes, per-game settings and FPS limits work exactly like Steam games
- 🔄 Auto-update — new releases install silently in the background (can be disabled in Settings)
- 🌐 9 languages — the interface automatically follows your console language (EN/FR/DE/ES/IT/PT/NL/PL/RU)
- 🕹️ Quick access — colored store cards in the QAM, optional L3+R3 shortcut to open the store anywhere
- 🐧 Compatibility — we actively work to support every OS that can run Steam in Gaming Mode / Big Picture (Linux for now): portable detection, no distro-specific assumptions Per-distro package notes: docs/OS-NOTES.md.
Via Decky Loader, no desktop needed:
- Install Decky Loader
- Enable Developer Mode in Decky's general settings
- Decky settings → Developer → Install plugin from URL:
https://github.com/Necrosiak/SkullKey/releases/latest/download/SkullKey.zip
Or build from source:
pnpm install && pnpm run build
sudo bash install-local.shThen open the plugin and install the store dependencies from Settings → Dependencies.
A note on automatic updates. Decky owns the plugin's top-level directory, so the built-in updater can rewrite existing files but cannot create new ones. A release that adds a file at the top level therefore has to be installed the normal way — Install plugin from URL, above — rather than through the automatic update. The release notes say so whenever that is the case.
- Open the Quick Access Menu (…) → SkullKey
- Pick a store card (Epic / GOG / Amazon) and log in
- Install a game — it lands in your Steam library with proper artwork, in a per-store collection
- Play!
Found a bug, a rough edge, something misbehaving on your distro? Have an idea? Please open an issue — every report directly shapes what gets built next, and no report is too small. To help us fix it fast, include if you can:
- your distro & version (Bazzite 42, CachyOS, Ubuntu 24.04…) and how Steam runs (Gaming Mode / Big Picture / desktop)
- the plugin version (Settings → About) and the store/tab involved
- what you did, what you expected, what happened instead
- logs:
~/homebrew/logs/SkullKey/(dependency problems:ensure_deps.log)
Feature requests and "it works!" reports on unusual setups are just as valuable — they tell us what to support next.
SkullKey is a fork of Junk-Store by Eben Bruyns (BSD-3-Clause) — thanks for the solid foundations. Store engines by the Legendary, heroic-gogdl and nile projects.
This is an independent community project, not affiliated with Junk-Store, Valve, Epic Games, GOG or Amazon.
BSD-3-Clause — see LICENSE.
AI (Claude by Anthropic and Codex by OpenAI) was used in the making of this project — for reverse engineering, development and documentation. It was not used for any art or creative writing. Everything released publicly is reviewed by a human, and the results are my responsibility. If that is not something you are comfortable with, now you know.
If this project is useful to you, you can support its ongoing development on Ko-fi.
