Download SE Launcher.
Windows has a stable installer and a preview installer. Linux ships as an AppImage on the preview line. Both auto-update through Velopack once installed.
Unsigned binaries. Windows may show an unknown publisher warning.
Pick a build.
Use stable for a normal install. Use preview when you want Linux, the current dedicated server work, or the latest plugin loader changes.
| Build | Platform | Version | Action |
|---|---|---|---|
| Stable Recommended for most players | Windows x64 | 0.4.7 | Setup.exe |
| Preview Latest loader and platform changes | Windows x64 | 0.4.56-preview.0 | Setup.exe |
| Linux Client and dedicated server in one AppImage | Linux x64 | Preview | AppImage |
The Linux channel publishes on the preview line. The AppImage updates itself the same way the Windows installer does.
What you need.
The launcher does not include the game. You need a Steam copy of Space Engineers, and enough room for the launcher plus its crossgen cache.
Game
Space Engineers on Steam. The launcher starts the installed game through a launch option.
Windows
Windows 10 (2004 or newer) or Windows 11, x64. The installer handles the desktop runtime.
Linux
x64 Linux and an AppImage-capable desktop. The same file runs a dedicated server headless.
After the download.
Windows needs one launch argument in Steam. Linux needs the AppImage marked executable and the same kind of argument. The installation guide has both paths, the exact strings and the usual failure cases.
Packages and source.
Plugin templates and packages live on the project's NuGet feed. The launcher source, wiki and support forum are linked from the footer.