MJOLNIR Core
The modding platform for Halo Campaign Evolved. Free camera, console commands, mod management, and a community hub — all open source.
Everything You Need to Mod HCE
Built from the ground up for Halo Campaign Evolved's hybrid UE5 + Blam engine architecture.
FlyCam
Smooth free-flying debug camera with WASD movement, mouse viewport look, speed boost, and auto HUD toggle.
Developer Console
Full UE5 developer console enabled in the shipping build via dwmapi.dll proxy and custom UE4SS signatures.
Mod Launcher
One-click desktop app to install, manage, and update mods. Auto-detects your HCE installation.
Community Hub
Browse, download, and share mods with the community. Discord integration and player tracking coming soon.
Hot Reload
Press CTRL+R in-game to instantly reload all Lua mods without restarting. Iterate at the speed of thought.
Open Source
MIT licensed. Reverse-engineered with Ghidra, built with UE4SS, and driven by the community.
Quick Reference
Default hotkeys — fully customizable
Ready to Forge?
Download the launcher, install your first mod, and join the MJOLNIR community on Discord.