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.

  • Atera all-in-one platform IT management software with AI agents Icon
    Atera all-in-one platform IT management software with AI agents

    Ideal for internal IT departments or managed service providers (MSPs)

    Atera’s AI agents don’t just assist, they act. From detection to resolution, they handle incidents and requests instantly, taking your IT management from automated to autonomous.
    Learn More
  • Field Sales+ for MS Dynamics 365 and Salesforce Icon
    Field Sales+ for MS Dynamics 365 and Salesforce

    Maximize your sales performance on the go.

    Bring Dynamics 365 and Salesforce wherever you go with Resco’s solution. With powerful offline features and reliable data syncing, your team can access CRM data on mobile devices anytime, anywhere. This saves time, cuts errors, and speeds up customer visits.
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  • 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: 26 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: 27 This Week
    Last Update:
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  • 3
    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: 1 This Week
    Last Update:
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  • 4
    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: 1 This Week
    Last Update:
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  • Turn more customers into advocates. Icon
    Turn more customers into advocates.

    Fight skyrocketing paid media costs by turning your customers into a primary vehicle for acquisition, awareness, and activation with Extole.

    The platform's advanced capabilities ensure companies get the most out of their referral programs. Leverage custom events, profiles, and attributes to enable dynamic, audience-specific referral experiences. Use first-party data to tailor customer segment messaging, rewards, and engagement strategies. Use our flexible APIs to build management capabilities and consumer experiences–headlessly or hybrid. We have all the tools you need to build scalable, secure, and high-performing referral programs.
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  • 5
    An Online Game Library. Client platform is Windows. Server is Linux.
    Downloads: 1 This Week
    Last Update:
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  • 6
    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: 1 This Week
    Last Update:
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  • 7
    Mobile Network Framework Extension for Android
    Downloads: 1 This Week
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  • 8
    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: 1 This Week
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  • 9
    The Duckpond project

    The Duckpond project

    Java decentralized cross-platform network multiplayer game engine

    A new decentralized way of network game-design.. Server-client-client-based with object-streaming. Which means that everyone can run a server with almost no hardware costs. The whole system is built upon a network of trust in within the masterclient delegates tasks.
    Downloads: 1 This Week
    Last Update:
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  • All-in-one security tool helps you prevent ransomware and breaches. Icon
    All-in-one security tool helps you prevent ransomware and breaches.

    SIEM + Detection and Response for IT Teams

    Blumira’s detection and response platform enables faster resolution of threats to help you stop ransomware attacks and prevent data breaches. We surface real threats, providing meaningful findings so you know what to prioritize. With our 3-step rapid response, you can automatically block known threats, use our playbooks for easy remediation, or contact our security team for additional guidance. Our responsive security team helps with onboarding, triage and ongoing consultations to continuously help your organization improve your security coverage.
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  • 10
    Vertex

    Vertex

    An open-source, multiplayer fps based on Cube 2 Engine.

    Downloads: 1 This Week
    Last Update:
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  • 11
    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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  • 12

    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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    See Project
  • 13
    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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  • 14
    Bz-place style for game browsing.
    Downloads: 0 This Week
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  • 15
    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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  • 16

    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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  • 17
    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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  • 18
    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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  • 19

    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
    Last Update:
    See Project
  • 20
    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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  • 21
    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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  • 22
    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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  • 23
    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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  • 24
    This project use OGRE3D graphic module, Havok Physics, RakNet and OpenAL. Make a MMO game framework.
    Downloads: 0 This Week
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  • 25

    NxCube

    mGSTEP port of the Cube game engine

    NxCube is a port of the Cube game engine to mGSTEP.
    Downloads: 0 This Week
    Last Update:
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