Mass Effect 3's co-op mode is playable in Legendary Edition. EA left it out of the 2021 remaster, so the modding group ME3Tweaks rebuilt it themselves, in secret since 2023, and released it on November 7, N7 Day. It is free on Nexus Mods, runs as a separate game install and adds things the 2012 original never had, including three heavy weapons and controller support.
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Who made it and why now
ME3Tweaks is the crew behind ME3Tweaks Mod Manager and the Legendary Explorer toolset, and the same people who hacked on the original ME3 multiplayer back when it was alive. Project lead Mgamerz uploaded Legendary Edition Multiplayer (they shorten it to LMP) to Nexus on the evening of November 7. The first public build is already numbered 1.0.34.
The timing is not an accident. EA closed BioWare and cancelled Mass Effect 5 a few weeks ago, and N7 Day was the first one without a studio behind the series. Modder Audemus told Rock Paper Shotgun that the community has always carried the torch "with or without an official future", and that he now feels that responsibility "more acutely than I ever have before".
The video loads from YouTube (Google) when you press play. Privacy policyWhat is new: three heavy weapons and mixed waves
The base is the full ME3 multiplayer, all of it. On top of that:
- Heavy weapons: Reaper Blackstar, Blackstorm and Cain. You can also leave the heavy weapon at home for more ammo and movement speed.
- Wave modes: Unified throws Geth, Reapers and Cerberus at you in the same waves, Coalition is the second new one (both named by Audemus to RPS).
- Looks: sharper textures and lighting rebaked with Unreal Engine 4's lighting system, plus HDR from Legendary Edition.
- Comfort: native controller support with hot switching to mouse, adjustable aim assist and FOV, a photo mode that works in multiplayer, per-effect accessibility toggles (yes, you can finally turn down Hunter Mode's glare).
There is also a long bug list, including fixes from EyeSpy's unofficial MP patch for the original, used with permission. Matchmaking runs on ME3Tweaks servers, and RPS says a private server option exists for playing with friends.
How to install it, and what is missing
You need Legendary Edition on PC with an unmodded Mass Effect 3 inside it, or a backup of LE3 made in Mod Manager. LMP builds its own game installation next to the trilogy, so your modded singleplayer stays untouched.
- Get ME3Tweaks Mod Manager 10.0 or newer and run it once.
- Import the download from Nexus. It contains two parts, the Launcher Mod and LMP itself, and both are needed.
- Select Legendary Edition Multiplayer and press Install LMP. If you still have the original ME3 on PC, the installer can carry over your old multiplayer profile.
- Start it from Steam, the EA app or Mod Manager.
One trap from the mod page: if you import your old profile, launch Legendary Edition once beforehand, otherwise EA app cloud sync may see a conflict in your saves folder. Three things did not make the release: voice chat, ModMaker's unreleased maps and Pizza Run. The team says they may return. A proper multiplayer store and server statistics are on the to-do list. If you played ME3 co-op in 2012, I would not wait for those, the core is all there now.
Sources
Nexus Mods: Legendary Edition Multiplayer by ME3Tweaks (uploaded November 7, 2026; features, installation, removed features, credits; screenshots and key art).
Legendary Edition Multiplayer, N7 Day 2026 trailer (channel of project lead Mgamerz).
Rock Paper Shotgun: interview with ME3Tweaks modders (November 7, 2026; development since 2023, Unified and Coalition modes, servers, quotes).
ME3Tweaks (Mod Manager).
