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ORBIT

One launcher for every game on your PC. ORBIT auto-detects everything installed from Steam, Epic Games, GOG and Xbox Game Pass and puts it all in a single fast, native library — click a game and it launches through the right store, every time.

Four launchers, four logins, four windows just to see what you own — ORBIT replaces the daily juggling with one window: your whole library, real cover art, playtime, and a Ctrl+K palette to jump to any game.

• One library, four stores — Steam, Epic, GOG and Game Pass installs detected automatically. No accounts to connect, no setup.
• Click and play — each game launches the way its store expects; you never think about where a game came from again.
• Nothing fabricated — the library shows only what's really on your disk: real installs, real owners, real playtime.
• Multi-account Steam, solved — got games spread across Steam accounts? ORBIT knows which account owns each game and switches to it for you on launch (details below).
• Offline mode — one click to play a Steam game offline, handled correctly.
• Private by design — never sees your passwords, no server, no telemetry; everything stays local.
• Native and fast — a single C++/Qt 6 app. No browser runtime, no background services, instant startup.
• English + Arabic (full RTL).
• Windows 10/11 for now.

⬇️ Download

Grab the latest release → Releases

1. Download Orbit-portable.zip.
2. Unzip it anywhere (Desktop, D:\Apps\Orbit, a USB stick — doesn't matter).
3. Run Orbit.exe inside the folder.

That's it — no installer, no admin rights, nothing to configure. Just keep the files in the folder together (the Qt runtime ships alongside the exe). Windows 10/11.

Your passwords are never touched. ORBIT has no login of its own and never asks for, sees, stores, or transmits your Steam/Epic/GOG/Xbox passwords — account switching works through Steam's own "Remember me" logins, the same ones Steam already keeps on your PC. Nothing is sent to third parties: there's no server, no telemetry, no analytics. Everything the app knows lives in local files next to it, and its only network traffic is downloading cover art from the stores' public image servers.

Using several Steam accounts? Log into each once with "Remember me" checked so ORBIT can switch between them. See First-time setup.

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The four stores

Store	How games are found	How they launch
Steam	appmanifest_*.acf in every library folder; owner resolved from Steam's local data (LastOwner → userdata → playtime tiebreak)	Switch to the owning account if needed → Steam launches the appid
Epic Games	The launcher's install manifests (%PROGRAMDATA%\Epic\...\Manifests)	com.epicgames.launcher:// deep link (silent)
GOG	Windows registry (HKLM\...\GOG.com\Games) — Galaxy not required	GOG Galaxy if installed, else the DRM-free exe directly
Xbox / Game Pass	<drive>:\XboxGames (MicrosoftGame.config)	shell:AppsFolder AUMID (the only way UWP titles can start)

Only Steam involves account switching — Epic/GOG/Xbox titles just launch under whatever their own client is signed into.

First-time setup

1. Run Orbit.exe. A one-time setup screen shows which stores were detected — there's nothing to connect or configure.
2. Click any game to play. Ctrl+K opens the search palette from anywhere.
3. Using more than one Steam account? Log into each once with "Remember me" checked so ORBIT can switch between them (mandatory — see the limits below). Games are mapped to their owning account automatically from local data — no API key needed.

Steam extras: account switching & offline mode

If all your games live on one account per store, ORBIT is simply a launcher and you can stop reading here. But if your Steam games are spread across multiple accounts, this is the feature that removes the daily pain: click a game and ORBIT switches Steam to the account that owns it, waits for the login, and launches — no logging out and back in by hand, no retyping passwords.

• Accounts → Add account restarts Steam to its sign-in screen so you can log in (check "Remember me"); the new account then appears with a ✓ ready badge once it can be switched to.
• Accounts → Switch now switches Steam to an account without launching anything.
• A game can occasionally stay unmapped (some family-shared installs record no local owner) — pin it to an account from its detail page (Pin to account…).

Two hard limits (by Steam's design)

1. ORBIT never types your password. Steam blocks scripted password entry (2FA by design). Silent switching works because Steam keeps a saved login after you log in once with "Remember me". When that saved login expires, ORBIT detects it and tells you to log in manually that one time — it doesn't pretend to automate it. A pre-flight check also warns up front if an account was never logged in with "Remember me", before touching your running Steam.

2. Offline mode uses Steam's WantsOfflineMode flag. Steam has no working offline CLI flag, and cold-starting offline with no live session just hangs. So ORBIT does what actually works: it logs the account in online first (which mints the session offline needs), sets WantsOfflineMode=1 while Steam is running, then restarts Steam so it comes up offline — and only then launches the game. If Steam comes back online instead, it does not launch, so a shared account is never used online by mistake. Use case: play a shared account without syncing over the other player's cloud saves.

Architecture

ORBIT is a single native C++17 application: a dependency-free core (src/core/ — pure C++, no Qt: VDF/JSON parsers, the OS platform layer, and one enumerator + launcher per store behind an IStore interface) under a Qt 6 / QML UI (src/ui/). The core is fully unit-tested headless against a synthetic Steam tree — no real Steam needed — and ssdiag gives a CLI view of everything the app sees.

History: the previous SteamSwitch app (Python + Tauri)

ORBIT started life as SteamSwitch, a Tauri (Rust) shell + Python sidecar + HTML/CSS UI, Steam-only. The C++ core is a behaviour-faithful port of that app's Python core/ (validated byte-identical on real hardware), with Epic/GOG/Xbox added on top. The legacy stack (core/, server.py, src-tauri/, web/) was removed after v1.0.0 — browse it at the v1.0.0 tag if you need it.

Build from source

One-time toolchain: CMake ≥ 3.21, MSVC (C++17), Qt 6.5+ (Core/Gui/Quick/Network).

cmake -S src -B build -DCMAKE_PREFIX_PATH=C:/Qt/6.7.2/msvc2022_64
cmake --build build --config Release

Package the portable folder (bundles the Qt runtime next to the exe):

C:\Qt\6.7.2\msvc2022_64\bin\windeployqt --qmldir src\ui\qml --release build\Release\Orbit.exe

Zip the resulting folder → that's the release artifact. Without Qt installed, CMake still builds the headless targets (sscore, ssdiag, sstests) on any OS — see src/README.md for details and the parity checks.

Diagnostics

build/ssdiag accounts    # Steam accounts + game→account mapping, with reasons
build/ssdiag epic|gog|xbox   # what each store enumerator sees
build/ssdiag games       # installed Steam games
ctest --test-dir build   # headless test suite

Troubleshooting

Offline launch: Steam hangs on the "Connecting…" screen

The most common offline problem, and machine-specific (almost always a corrupt Steam cache, not an ORBIT bug). ORBIT detects the hang, cleans up (clears the offline flag and closes the stuck Steam so your next start is normal), and does not launch the game. To fix:

1. Clear the download cache: Steam → Settings → Downloads → Clear Download Cache. This alone resolves most cases.
2. Delete Steam\appcache (if step 1 didn't help): exit Steam fully, delete the appcache folder in the Steam install dir (it's just a cache — games, logins and saves are untouched), start Steam once online, then retry.

Also note Steam's own rule: offline needs a recent online login (ORBIT does this for you), and Steam caps how long you can stay offline before it wants to reconnect.

"Finish login in Steam" / a game won't switch accounts

The saved login for that account expired. Log into it once in the Steam window with "Remember me" checked (password + Steam Guard that one time), then click the game again.

An Epic / GOG / Game Pass game won't launch

Those launch through their own store's plumbing — make sure the store's client (Epic Games Launcher / GOG Galaxy / Xbox app) is installed and signed in, and for Game Pass that the title's license is still active.

Privacy & safety

• No passwords, ever. ORBIT never asks for, reads, stores, or types a password. Switching rides Steam's own saved "Remember me" logins; when one expires, ORBIT tells you to log in manually in Steam — it doesn't try to automate it.
• No third parties. No server, no account system, no telemetry, no analytics, no API keys. The only network requests are cover-art downloads from the stores' public image CDNs and a once-per-launch update check against GitHub's public releases API (it never downloads or installs anything on its own — you click Download).
• Everything is local. Settings, the cover cache, and the game→account mapping are plain local files (settings.json, data/) you can inspect or delete at any time.
• Careful with Steam's files. Before the first write, loginusers.vdf is backed up to loginusers.vdf.bak; registry changes are limited to the same per-user values Steam itself uses for account selection.
• Open source. All of the above is verifiable — this repo is the entire app. See SECURITY.md for exactly what ORBIT reads, writes, and sends, and how to verify your download.

License

ORBIT is released under the MIT License — free to use, modify, and redistribute, including in commercial and closed-source work, as long as the copyright notice is kept.