Halo: Campaign Evolved doesn't have multiplayer, so modders added all 19 classic Halo CE maps — This is 'Mjolnir Core'

Master Chief wearing green tactical armor and a gold visor, holding a futuristic assault rifle inside a glowing blue geometric corridor structure.
(Image credit: Xbox Game Studios)

I’ll be honest, this one slipped under my radar. I didn’t even realize it had been released nearly two weeks ago, but it seems the community has taken on the mantle of responsibility for Halo lately in more ways than one.

First, there’s Project Reclaimer for Halo 3, which is everything Halo 3 on PC should have been. It features full custom server browsers, mod support, and a massive expansion to the sandbox with up to 128 players in a single match.

Not only that, but in Campaign Evolved, while it was reported that the remnants of Halo Studios are working to bring Theater and Firefight to the game in December, some community members have already taken it upon themselves to start testing Firefight within the game, to varying success, mind you.

Now onto the main attraction, Mjolnir Core, a community effort to bring multiplayer to Halo: Campaign Evolved. I must say, so far it’s pretty impressive. The project supports 19 maps, including classics like Blood Gulch, Battle Creek, and Hang ‘Em High. The mod also supports up to 16 players, pushing past the initial four-player limit it had at the start of development.

HALO KEEPS GETTING BETTER - NEW Halo 3 Content, Halo Remake UPDATE, Campaign Evolved Multiplayer. - YouTube HALO KEEPS GETTING BETTER - NEW Halo 3 Content, Halo Remake UPDATE, Campaign Evolved Multiplayer. - YouTube
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The mod itself is in alpha, but those working on it have put together a pretty hefty amount of documentation for those who wish to help and get involved. From what I can tell, the mod works pretty effortlessly.

You get the launcher, install multiplayer, and you’re ready to go. That said, I don't believe there’s any public game browser in the game yet, so you’ll need to invite friends through your fireteam to play together.

Seeing the community put this much effort in really pains me. Halo: Campaign Evolved needed some sort of multiplayer content at release, even if it were just Firefight. And whilst projects like this are great, they’ll likely sadly remain rather niche, as people have already moved on to other games like Gears of War: E-Day, which actually outperformed Halo on launch.

Regardless, I can’t stress enough how cool this is and how I hope the team behind it continues their hard work. So let me know your thoughts: is this cool, too little too late, or do you have any other thoughts? Drop them in the comments, and be sure to take part in our poll!


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Adam Hales
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Adam is a Psychology Master’s graduate passionate about gaming, community building, and digital engagement. A lifelong Xbox fan since 2001, he started with Halo: Combat Evolved and remains an avid achievement hunter. Over the years, he has engaged with several Discord communities, helping them get established and grow. Gaming has always been more than a hobby for Adam—it’s where he’s met many friends, taken on new challenges, and connected with communities that share his passion.

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