**Updated 12/16**
If you've been looking to get involved with modding Halo: The Master Chief Collection, there's never been a better time than the present.
We have officially made the first of several publishes of official mod documentation in a central location. You can find the information here:
MCC Mod Documentation
You can leverage these documents to dip your toes into modding and to arm yourself with knowledge before forging ahead. Along with the documentation and impending Halo 4 (...and Halo 2: Anniversary! 🎉) mod tools, we will be introducing a tool to help you create and upload your own mod packages directly to the Steam Workshop. Called "Excession," this tool will be coming to the MCC mod scene in a further update and is intended to help make creating, sharing, and installing mods more accessible to the community.
The documentation is a work in progress and will evolve over time. For now, you can learn how to leverage Excession and get help modding with Halo 2 & Halo 3.
While you wait for the upcoming MCC update, be sure to check out the documentation and be ready to drop in feet first when it's out!
As a wise man once said, "We're just getting started." and we can't wait to share more with you.
Update 12/16:
We recently published an update to the MCC Mod Upload Tool that better allows users handle minimum and maximum versioning.