Halo MCC Nucleus Co-Op Guide
Halo: The Master Chief Collection supports local split-screen via Nucleus Co-Op using local multiplayer connection. You can play all six Halo campaigns and multiplayer modes with 2-4 players on a single PC using dedicated controllers.
Get game setup in NucleusRequirements
How to Set Up Halo: The Master Chief Collection Split-Screen
The Halo MCC handler is one of the most polished and reliable in the Nucleus ecosystem. Follow these steps to get split-screen running in under 10 minutes.
- 1.
Install Nucleus Co-Op
Download and extract Nucleus Co-Op to C:\NucleusCo-op. Add the folder to Defender exclusions before extracting. Use 7-Zip with password 'nucleus'.
- 2.
Download the MCC Handler
Open Nucleus, click Add New Games, and search for 'Halo Master Chief Collection'. Click Install. Alternatively download the handler from the Nucleus game library and extract it via Nucleus.
- 3.
Point to MCC Executable
When prompted, navigate to your Steam installation: C:\Program Files (x86)\Steam\steamapps\common\Halo The Master Chief Collection and select MCC-Win64-Shipping.exe.
- 4.
Launch Steam First
Make sure Steam is running and you are logged in before launching Nucleus. MCC requires an active Steam session for matchmaking even in LAN mode.
- 5.
Assign Controllers
Press a button on each controller to make them appear in the Nucleus UI. Drag controller 1 to the left screen section, controller 2 to the right (and so on for 3–4 players).
- 6.
Click Play
Press the Play button. Nucleus will launch two or more MCC instances, resize them, and arrange them side by side. Wait 30–60 seconds for both instances to fully load.
- 7.
Connect via LAN
In the first instance, go to Multiplayer > LAN and create a game. In the second instance, join the LAN game. For campaign co-op, use Campaign > Co-Op > LAN.
Tips
Set graphics preset to 'Low' or 'Medium' in each instance before connecting — running two MCC instances is GPU-intensive.
Use the Custom Resolution (960x1080 for side-by-side or 1920x540 for top-bottom) to avoid stretched visuals.
If one controller controls both screens, open Steam > Settings > Controller and disable Steam Input for MCC.
For 3–4 players, assign each controller to a quadrant in the Nucleus layout editor before clicking Play.
Cap FPS at 60 in MCC video settings for each instance to distribute GPU load evenly.
Common Issues
Halo MCC instances won't connect via LAN +
MCC is very slow or stuttering on one instance +
Controller is controlling both Halo MCC screens +
About Halo: The Master Chief Collection Split-Screen
Halo: The Master Chief Collection was released on PC in 2019 by 343 Industries, bringing together Halo CE Anniversary, Halo 2 Anniversary, Halo 3, Halo 3: ODST, Halo Reach, and Halo 4 in a single package. While the console versions included local split-screen, the PC version launched without native split-screen support.
Nucleus Co-Op solves this by running two copies of MCC simultaneously on your PC and connecting them via a local network session. Each copy of the game acts as a separate player — they can join each other's LAN lobbies for both campaign co-op and multiplayer modes.
The MCC Nucleus handler is considered one of the most reliable in the community, with strong support for 2-player setups and reasonable 4-player performance on higher-end hardware. The handler handles window management, controller assignment, and local multiplayer connection automatically.
For best results, a gaming PC with at least 16GB RAM, a modern 6-core CPU, and a dedicated GPU with 6GB+ VRAM is recommended when running two full instances of MCC. Each instance runs the full game engine independently.
