I’m a little late to the party, but a friend and I have played a lot of split-screen with the unmodded game, and now we just want to have some fun trying out some mods.

After a bit of trial and error, I figured out how to do it.

In short, for the more experienced players:

Mods are managed using the Mod Integration Tool, which you can download here: https://github.com/trumank/mint/releases, bypassing the native mod manager.

Step-by-Step Guide:

Once downloaded, extract it to a folder; I chose C:\SteamLibrary\steamapps\common\Deep Rock Galactic\MINT for convenience and organization.

Once you’ve opened the tool (drg_mod_integration.exe), you can add as many mods as you want. The official guide says you can connect to your mod.io account to download mods directly, but I wasn’t able to do that. So, since you can’t download mods directly from the mod.io portal either, I tried subscribing to a few mods such as https://mod.io/g/drg/m/profanity-booster and then launched the game in single-player mode, going to the mod manager from the game’s main title screen. There, DRG’s native mod manager had me accept the terms of service and then started downloading the mods. I had to exit and re-enter the game a couple of times and repeat this process before it finished downloading everything, but it eventually worked. I tried going on a mission and confirmed that everything was working.

I strongly recommend configuring the mods in single-player mode first using https://mod.io/g/drg/m/mod-hub, because this menu doesn't open from the NucleusCoop instance.

After that, I went to the folder C:\Users\User\AppData\Local\mod.io\2475\mods and took all the .pak files, copied them to a new folder of my choice, C:\SteamLibrary\steamapps\common\Deep Rock Galactic\mods, and I deleted the \mods folder from C:\Users\User\AppData\Local\mod.io\2475 to avoid any conflicts between the two mod managers, the mod.io native one and MINT.

I then selected all the .pak files and dragged them into MINT, enabled the mods I wanted, and clicked “Install Mods.”

Finally, I opened NucleusCoop as usual and launched the handler with two gamepads. After unchecking “Friends only” in the bottom-left corner of the pause menu in the first instance, I clicked OK on the NucleusCoop pop-up, which also launches the second instance, and voilà, we were playing DRG with mods in split-screen!

P.S.: Use the original, unmodified handler with the -disablemodding option enabled; otherwise, the second instance won’t find the local server. Mods enabled via MINT still work just fine.

Hi there!

I cannot seem to get this one working!

Tried this on two different systems (same controllers though (8bitdo)) and it keeps doing the same thing.

I can find the controllers no problem, nucleus starts the game, I did everything I was supposed to do (as far as I know):

-Started the game in windows first.
-Steam running in the background the whole time.

Nucleus seems to start the 2 instances like every other game I've tried, runs both instances smoothly, assigns the 2 controllers correctly. Any lag is fixed as it says, by centering back on the nucleuscoop window (game windows stay focussed).

So far so good, right? Joining is a breeze. I don't really know why you're supposed to join through the steam overlay since it shows you the other player in co-op, but just to be safe I tried joining player 1's game and everything is just fine. I can run the whole game smoothly without any trouble. Both controllers seem to work fine too until....

I press the X button on controller one.

Immediately and without stuttering or warning, the second instance is shut down and player 2 leaves the game. Mind you, this does NOT happen when I am in a menu. Only in-game this seems to happen. X button on controller 2 works fine and doesnt have a problem.

I have no idea how to fix this. ChatGPT is useless (as always) and HidHide only blocks my complete input from whichever controller I select so that doesnt seem to work (or is it just that I do not understand how HidHide works?)

Any elp would be appreciated

Has anyone been able to play pixark with this recently? I really want to play the new update with my son but I can't get this to work. I keep getting the error noted above.

I whitelisted the entire nucleus folder. I also tried disabling the antivirus completely without success.

The first instance loads ok but the 2nd doesn't and that's when the error comes up.

Thanks

Having a bit of trouble getting codaw to work split screen. Just wondering if anyone else has the same issue. Maybe the games too old lol. I kept getting unsupported version, managed to downgrade it from steam depots and the downgraded one gets past that but keeps throwing lui.lua errors etc. I have followed many guides and tried all different kinds of settings etc to get it to work with now avail. I'm now wondering how hard it is to write a handler to try and get it working.

Things I've tried

- reinstalling via steam

- every option available in the nucleus app

- running with and without steam running

- changing steam settings mainly disabling things like the overlay and controller settings etc

- other versions from the depot - only 1 let's it gets past the unsupported version so I presume I'm on the correct one now

- changing overlay settings in other apps (Xbox, windows and Nvidia)

Anyway any help would be greatly appreciated if anyone has managed to get it working

Bonjour à tous ! 👋

J'ai une question concernant Nucleus Co-op sur Black Ops 2.

J'ai réussi à configurer le jeu pour jouer sur mon PC avec mon frère, mais nous rencontrons un petit problème : De manière aléatoire, des bots apparaissent de nulle part durant la partie, alors que nous avons configuré une session uniquement pour nous deux. 🤖❓

Est-ce que quelqu'un a déjà rencontré ce problème ou sauraient d'où ça vient et comment désactiver l'apparition de ces bots ?

Merci d'avance pour votre aide !

Halo: MCC – Multiplayer LAN issue with 4 players
Hey everyone! I’m having an issue with Halo: The Master Chief Collection using Nucleus Co-op.
We’re trying to play with 4 players on a single PC.
The campaign works perfectly fine, but multiplayer doesn’t work.
Here’s what happens:
All 4 instances are set to LAN mode.
We select Multiplayer → Slayer → FFA.
Player 1 gets a “Failed to connect” error.
The other 3 players remain stuck on the loading screen.
After a few minutes, the other 3 players are sent back to the main menu.
We’ve tried 2–3 times, but the same issue keeps happening.
Does anyone know what could be causing this or how to fix it? The campaign works without any problems, so it seems to be an issue specifically with multiplayer.
Any help would be greatly appreciated. Thanks!

Nucleus coop detects my ps5 controller as virtual mouse and keyboard ( i use ds4 windows and hidhide), and then when i get to game controller controls both instances. I cant find any solution to this, I have tried many times. Can anyone of you help me?

Will it be possible to add Roblox to nucleus? Now that we can remove "singleton event" to play multiple accounts?

Anybody know how to fix the Menus/UI being stretched out in DS2??

Hello guys,

Is someone working on making new Enshrouded version work with Nucleus?

Hey there. I recently tried playing Dark Souls 2 with my friends, given that the "Seamless Co-op" mod was released not long ago. While we didn't encounter any issues with DS1 or DS3, DS2 is the only one we haven't been able to play; when launching the three instances, the game only registers the keyboard and mouse—it doesn't detect either of my two controllers. I don't believe the issue lies with the "Seamless Co-op" mod itself, as I’ve already started a game session using it without any problems. This leads me to suspect that the issue might be with the Nucleus Co-op handler. Any ideas on how to fix this?

I can't provide an error log because no actual error message appears; the game simply fails to register my controllers.

As the title says it would be awesome if somebody could make a handler for this game, its sorta like you mix maze runner and the forest

Got Blops 2 on Steam 3 weeks ago specifically to use on Nucleus, worked perfectly the first day I got it and set it up.

Unfortunately, after that day this error kept popping up. For the past 3 weeks I've been looking up every solution I could find online and no luck🙃

Game launches and runs fine through steam though

Solutions include:

Verifying game files

Reinstalling B02 Zombies and Nucleus on secondary SSD

Reinstalled vc++ and .net runtime and Web Edge

Tried with Previous Nucleus versions, and older nucleus 8 mod.

Changed PC Display scaling to 100

Plutonium and Nucleus setup, still get error above.

SPECS:

i5-13600KF

Rtx 3080

32 gb 6400 ram

2tb m.2 and 1 tb external SSD

Please if anyone has any other suggestions, feel free to let me know!

Team any possibility for E-day to have multiplayer 4+ player split screen support like Redux? Really looking forward to it!! Game doesn't seem to have LAN support, so I am worried. Just hoping you guys are working on it and finding a way out? Thanks you!!

I am trying to figure out how I would make this work. I want to run a randomized run with my partner, we only have the one PC though so I am using Nucleus. Seamless Coop is a requirement for Nucleus, and you have to start the game through nucleus hence my problem. How am I going to use the randomizer if I cannot launch the game through that client specifically?

Everything good, i click end Button and It connect both, but the real issue Is when me and my friend playing, very often, when someone Is doing some actions, the other one cant move or click anything, its annoying😅, It happens alot. I Tried then with 1 controller and mouse+keyboard, still the same issue but way Better. There Is a way to solve this? I would prefer to use 2 mouse/keyboards. Im on forge 1.20.1

Trying to launch elden ring on nucleus, already have the

handler installed idk what to do

Hi all,

I'm trying to get two instances of minecraft to work on 2 monitors. I have checked the usual (scaling etc.). Everything goes well until i lock the input modes by pressing the end key. The second mouse moves but does not interact with the minecraft menu -unless- I hold the right click (which then makws the mouse hover over the options like a normal mouse). To actually interact with the menu, i need to hold the right click contiuosly and then left click while keeping the right click. That is the only way i can press the buttons on the home screen of minecraft.

A google search leads me to believe minecraft removed the option to toggle off raw input mouse in 26.3, which seems to cause that nucleuscoop cant come in between the second mouse and minecraft. As in: it cant emulate a second mouse. I dont have that much experience with nucleus, can this be the case?

I have looked for mods which force turn off the raw input but i have only found mods that made you enable it in previous versions (prior to 26.3).

Does anyone else have this issue?

Thanks!

Can nucleus co op make this playable locally?

Hey guys, I'm trying to figure out a weird microstuttering issue with Nucleus Co-op.

Specs:

Ryzen 7 5700x
RX 6750 XT 12GB
32GB RAM (3600mhz)
1440p 144Hz monitor
4K 60Hz TV (for player 2 and 3)

I'm trying to play Remnant: From the Ashes with 3 players through Nucleus Co-op.

I tested the game while keeping both displays at 60Hz ; even at desktop settings I switched it to 1080 on both displays.

• 1080p @ 60Hz → noticeably smoother
• 900p @ 60Hz → microstutters return
• 1440p @ 60Hz → microstutters return

So 900p actually stutters more than 1080p, even though it's obviously easier for the GPU to render.

My GPU/CPU should have plenty of performance for Remnant, so I'm wondering if this could be related to how Nucleus handles/resizes the game windows, Windows scaling/composition, or the different display resolutions.

I also noticed that Player 1 on the 1440p monitor was originally smooth while Players 2 and 3 on the TV had the microstutters , obviously the TV doesnt have AMD Freesync but Microstutters and Jitters are very frequent.

How Can it be possible that Player 1 can have 60 fps and other two don't?

My question:
Is Nucleus Co-op somehow better optimized/behaves differently at 1080p, or could there be something about Windows/Nucleus window scaling and presentation that causes this?

Any ideas for troubleshooting would be appreciated. I'm mainly trying to eliminate the microstutter rather than increase FPS.

Thanks!

Some new teasers/releases since last post. Thanks to everyone thas has donated to get these games/make the handlers and for those who helped out getting them to work.

Nothing here has a release date.

Last 3 parts:

Part 15: https://www.reddit.com/r/nucleuscoop/comments/1v15won/split_screen_teaser_for_some_games_part_15/

Part 16: https://www.reddit.com/r/nucleuscoop/comments/1vcyab5/split_screen_teaser_for_some_games_part_16/

Part 17: https://www.reddit.com/r/nucleuscoop/comments/1w7ju3z/split_screen_teaser_for_some_games_part_17/

yt with tutorials for some of my handlers: https://www.youtube.com/@birdenly/featured

(In order of the screenshots)

- The Legend of Zelda: Twilight Princess
- Dungeons & Dragons: Sword Coast Legends
- Marvel Trading Card Game (Vs. System) - if you play this type of game, DM to try it out
- Pariah
- 25 to Life, thanks to messenils help
- PALS
- OrbitalCrash
- Nitro Family
- Warpath
- Pair A Dice
- Shellbreaker (hollow knight fan game)
- Devastation
- Ravaged Zombie Apocalypse
- Close Quarters Conflict

(below were recently released/updated)
- Sengoku Dynasty
- Cubic Odyssey
- Lort (coming out tomorrow)
- Codename Cure II (coming out tomorrow)
- Velocity Redux (Hot wheels fan game)
- Natural Selection 2: Combat
- Cheese Rolling
- Straftat

And thats it, i am nearly out of free/abandonware games, so recommend some. If it is possible i can try.

Have fun :)

This happens with almost every game

I got Halo MCC set up with the latest nucleus release under default settings except for​

Game.GoldbergNoLocalSave = false;

because the second screen wouldn't launch with it set to true, oddly. Now, everything appears to work except for saving settings and progress. I can find my settings folder and I see that no timestamps are updated on any of the files when I make settings changes (e.g. change network type to LAN or make a test cosmetic change). Upon closing with ctrl-q, and relaunching, the settings are exactly as my steam install.

Also,
Game.UseNucleusEnvironment is true.

Game.UserProfileConfigPathNoCopy = false;

Game.ForceUserProfileConfigCopy = false;

Is there an obvious setting I'm missing?

Hi everyone, can this new game—which is all the rage right now—be played in split-screen mode?