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24 alternativesNucleus Co-op
github.com/SplitScreen-Me/splitscreenme-nucleus
Game Utilities & Launchers
Open-source projectOpen source
Launch multiple instances of a supported game for split-screen multiplayer with Nucleus Co-op.
About Nucleus Co-op
Nucleus Co-op starts multiple instances of a supported game on Windows so several players can play together on one PC with one game copy. It links the instances through LAN or multiplayer emulation, assigns each instance to a specific gamepad, and resizes and positions the windows to create split-screen.
It does not add multiplayer to single-player games; the game must already support LAN, online multiplayer, or connection through mods. Use on Windows requires .NET Framework 4.7.2 or higher and Microsoft Visual C++ 2015-2019 Redistributables for x86 and x64.
Key features
- Starts multiple instances of a supported game from one copy
- Assigns each instance to a specific gamepad
- Connects instances via LAN or multiplayer emulation
- Resizes and repositions game windows for split-screen
- Supports player nicknames and input order settings
- Offers customizable interface with themes and game covers
Best for: Windows PC owners who want to play supported LAN or online multiplayer games in local split-screen on one computer.
Good for
- Open source tool for Windows
- Designed to work with one PC and one game copy
- Includes handler customization and display scaling support
Watch out for
- Does not add multiplayer to single-player-only games
- Requires existing LAN, online multiplayer, or mod connection
- Requires .NET Framework and Visual C++ redistributables
Nucleus Co-op at a glance
- Category
- Gaming › Game Utilities & Launchers
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Nucleus Co-op FAQ
How does Nucleus Co-op work?
It opens multiple instances of the same game files, assigns each instance to one gamepad, connects them via LAN or multiplayer emulation, and resizes and repositions the windows for split-screen play.
Can it add co-op to a single-player game?
No. The game needs to already have LAN or online multiplayer, or another way to connect instances, such as through mods.
What is required to run it?
Windows with .NET Framework 4.7.2 or higher and Microsoft Visual C++ 2015-2019 Redistributable for both x86 and x64, plus Edge WebView2 if the downloader gets stuck on the loading screen.
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