Browse free open source Multiplayer games and projects below. Use the toggles on the left to filter open source Multiplayer games by OS, license, language, programming language, and project status.

  • Auth0 for AI Agents now in GA Icon
    Auth0 for AI Agents now in GA

    Ready to implement AI with confidence (without sacrificing security)?

    Connect your AI agents to apps and data more securely, give users control over the actions AI agents can perform and the data they can access, and enable human confirmation for critical agent actions.
    Start building today
  • Zenflow- The AI Workflow Engine for Software Devs Icon
    Zenflow- The AI Workflow Engine for Software Devs

    Parallel agents. Multi-agent orchestration. Specs that turn into shipped code. Zenflow automates planning, coding, testing, and verification.

    Zenflow is the AI workflow engine built for real teams. Parallel agents plan, code, test, and verify in one workflow. With spec-driven development and deep context, Zenflow turns requirements into production-ready output so teams ship faster and stay in flow.
    Try free now
  • 1
    FreeCS

    FreeCS

    FreeCS is a free-software reimplementation of Counter-Strike 1.5.

    FreeCS is a free-software reimplementation of Counter-Strike 1.5 running on the FTEQW engine. All it is, is a game-logic re-implementation in QuakeC, an architecture independent programming language. FreeCS is not a game-engine as it relies on FTEQW (released under the GPL V2). All this makes it possible to play FreeCS on virtually any platform! No DRM! No third-party accounts! Just download, play, contribute. The game-logic is written by me with help of twhl.info's wiki. It has since been incorporated into the Nuclide project, which re-implements more than just CS 1.5.
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    Downloads: 47 This Week
    Last Update:
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  • 2

    coldev

    C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT

    + C/C++ and PHP projects, Python and Others + 3D ENGINES + Videogames Projects based in Bennugd http://www.bennugd.org Web Page https://coldev.sourceforge.io/
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    Downloads: 10 This Week
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  • 3
    To write a comprehensive client/server code is a difficult task for a programmer.Here, I provide a universal open source code server based on IOCP.Hope helpful for you.
    Downloads: 0 This Week
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  • 4
    Bad ∞ End ∞ Game

    Bad ∞ End ∞ Game

    An HTML web game platform

    Bad ∞ End ∞ Game is an HTML web game platform. The platform is currently under construction and will soon be going into an Open Alpha phase.
    Downloads: 0 This Week
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  • Grafana: The open and composable observability platform Icon
    Grafana: The open and composable observability platform

    Faster answers, predictable costs, and no lock-in built by the team helping to make observability accessible to anyone.

    Grafana is the open source analytics & monitoring solution for every database.
    Learn More
  • 5

    Bengine

    Free strategy browsergame engine.

    Galactic strategy Open Source browsergame. Replacement of the former game Net-Assault.
    Downloads: 0 This Week
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  • 6
    This is our Bleach game. We have a fairly large team of developers so have made our code SVN!
    Downloads: 0 This Week
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  • 7
    Bz-place style for game browsing.
    Downloads: 0 This Week
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  • 8
    Cartomancer
    Cartomancer is an open-source project, to develop a card-game edition program. With Cartomancer, you will be able to create your card-game from the beginning to the end, you are 100% free !
    Downloads: 0 This Week
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  • 9
    This is a basic client/server game in DirectX featuring up to 16 simultaneous players moving around a flat sheet of grass as skinned/animated .X meshes (the Tiny model from Microsoft demos) in only about 3500 lines of code.
    Downloads: 0 This Week
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  • Desktop and Mobile Device Management Software Icon
    Desktop and Mobile Device Management Software

    It's a modern take on desktop management that can be scaled as per organizational needs.

    Desktop Central is a unified endpoint management (UEM) solution that helps in managing servers, laptops, desktops, smartphones, and tablets from a central location.
    Learn More
  • 10
    An Online Game Library. Client platform is Windows. Server is Linux.
    Downloads: 0 This Week
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  • 11

    Frantic

    MMOG Framework. Starting place to build a game.

    Frantic is envisioned to be a jumping off point for developers so that they can begin building the world and implementing the art, mechanics, and the things that make their game special. I will try to get in the basics all games need so that the Devs can begin changing it :D
    Downloads: 0 This Week
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  • 12
    Mod-friendly framework for the creation of 3D-rendered, two-dimensional fighting games. Default character-set features open source mascots (e.g. Tux). A cross-platform Super Smash Bros. clone.
    Downloads: 0 This Week
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  • 13
    The Glou (Game LOUnge) Project is an open, cross-platform game lounge system, used to play online with people from around the world, browsing through and easily joining multiplayer games.
    Downloads: 0 This Week
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  • 14

    Hiukuss-SAMP

    Just a repo for my filterscripts and includes

    This is a page for filterscripts created by me (Hiukuss) and gamemodes (includes too!) All files uploaded are in-fact Open Source due to the fact that I release the sources itself (rules on the SA-MP forums) I do not mind if you modify it for your own use, but please honor me, the creator and DO NOT REUPLOAD OR CLAIM AS YOUR OWN. I hope you understand :) ~Hiukuss
    Downloads: 0 This Week
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  • 15
    This is a Python based mini-game framework that supports the Wii Remote as primary input. It employs PyGame, PyOpenGL, PyBluez, and a Python port of Wiigee.
    Downloads: 0 This Week
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  • 16
    IceQuest
    IceQuest is a browsergame engine driven by PHP and a database backend (mainly MySQL). It aims to be very flexible and easy to use.
    Downloads: 0 This Week
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  • 17
    Linux Wrath is a rpg/first person shooter Goal: destroy targets. Created at aueb for the computer graphics course and took us 2 weeks to complete (we were 2 people). Project at: http://code.google.com/p/linuxwrath/
    Downloads: 0 This Week
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  • 18
    MINECRAFT2D hahn2014

    MINECRAFT2D hahn2014

    Minecraft side viewed game made in Java

    This started when one of my friends said I couldn't possibly make a full blown video game in Java, and know I have made Minecraft in Java and it consists of an inventory, blocks, and more!
    Downloads: 0 This Week
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  • 19
    Mobile Network Framework Extension for Android
    Downloads: 0 This Week
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  • 20
    Multiverse

    Multiverse

    Open Source Virtual World and MMOG Development Platform

    3D Client (Windows), Server, and Tools to easily create massively multiplayer games and virtual worlds. If you want to contribute to the source code please go to https://github.com/multiversemmo/MultiversePlatform
    Downloads: 0 This Week
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  • 21
    This project use OGRE3D graphic module, Havok Physics, RakNet and OpenAL. Make a MMO game framework.
    Downloads: 0 This Week
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  • 22

    NxCube

    mGSTEP port of the Cube game engine

    NxCube is a port of the Cube game engine to mGSTEP.
    Downloads: 0 This Week
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  • 23
    A small Java program, with a server and a client. Clients can connect to the server and a simple character can walk around on a grassy plane, like an online game. Nothing special, but some people wanted the sourcecode.
    Downloads: 0 This Week
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  • 24
    Open Strategy Game Architecture is a framework for game creation.
    Downloads: 0 This Week
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  • 25

    Parallel Turn-based Engine

    Library for creating turn-based games with simultaneous moves.

    Downloads: 0 This Week
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