Download MJOLNIR Launcher
One-click mod management for Halo Campaign Evolved. Auto-detects your game, installs mods, and launches via Steam.
Windows Installer (.msi)
Requires Windows 10/11 (64-bit) and WebView2 runtime
Verify Your Download
Always verify the SHA-256 checksum to ensure your download hasn't been tampered with.
1
Official Build Checksums (Latest Release)
Fetching latest build checksums from CDN...
2
Compute the hash of your downloaded file
PowerShell (Windows)
(Get-FileHash .\MJOLNIR-Launcher*.msi -Algorithm SHA256).HashCommand Prompt
certutil -hashfile MJOLNIR-Launcher.msi SHA2563
Compare the hashes
If the hash you computed exactly matches the one in checksums.txt, your download is authentic and unmodified.
System Requirements
OSWindows 10/11 (64-bit)
RuntimeWebView2 (included in Win 11)
GameHalo Campaign Evolved (Steam)
Disk~50 MB for launcher