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.

  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
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  • Find Hidden Risks in Windows Task Scheduler Icon
    Find Hidden Risks in Windows Task Scheduler

    Free diagnostic script reveals configuration issues, error patterns, and security risks. Instant HTML report.

    Windows Task Scheduler might be hiding critical failures. Download the free JAMS diagnostic tool to uncover problems before they impact production—get a color-coded risk report with clear remediation steps in minutes.
    Download Free Tool
  • 1
    AssaultCube Reloaded

    AssaultCube Reloaded

    A fun realistic multiplayer free-and-open-source first-person-shooter!

    ACR is a fun realistic multiplayer free-and-open-source first-person-shooter! This project has moved to GitHub. A mirror of releases is here.
    Downloads: 23 This Week
    Last Update:
    See Project
  • 2
    Inexor

    Inexor

    Community fork of the Cube 2: Sauerbraten game.

    A while ago a bunch of people came together to create an awesome Open Source game.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    Lead

    Lead

    Tactically-oriented first person shooter, heavily WIP

    Lead (as the metal) is a heavily WIP open-source first person shooter planned to feature both extensive single-player campaigns and online multiplayer action. As a total conversion of Cube 2: Sauerbraten, it will combine nice graphics with fast and entertaining gameplay. Currently, there's almost no content, so if you can, please help out!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4

    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:
    See Project
  • Atera - The depth of a full-stack IT platform, with the power of AI. Icon
    Atera - The depth of a full-stack IT platform, with the power of AI.

    Atera introduces your autonomous AI agent - Ensure operational efficiency at any scale with 24/7 autonomous IT support.

    Atera prioritizes security and compliance through robust protections that align with industry standards. Our AI-driven features were built on responsible AI principles and empower IT teams to work efficiently while maintaining trust and compliance.
    Learn More
  • 5
    Open Miner is an open source sandbox-style game inspired by games like "Infiniminer" and "Minecraft".
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    Open-source alternative to the popular BYOND game Space Station 13.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Tactical Warfare Engine
    Tactical Warfare Engine is an Open Source 2.5D Real-Time Strategy game engine made using OpenGL. It aims to be a replacement for the aging StarCraft game engine, but also supports the creation of entirely new RTS games.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Tronacom
    Social Networking Features include multiplayer 3D Billiards, Personal Web Server, Web Cam Sever with motion detection, Web Cam Client, VOIP Voice Phone, P2P File Sharing, Instant Message, Chat Rooms and more. 3rd Party Plugins Welcome :)
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    isoccer - Football Game (INCOMPLETE)
    ✿ More projects here: https://sourceforge.net/u/jorgerosa/profile IMPORTANT: This football game is yet in an earlier development stage! (Scratch) A simple to play soccer game project, based on the oldies, but with actual machines graphics. Main idea is based on the "Sensible Soccer" and "Football Glory" Commodore Amiga classics.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Free and Open Source HR Software Icon
    Free and Open Source HR Software

    OrangeHRM provides a world-class HRIS experience and offers everything you and your team need to be that HR hero you know that you are.

    Give your HR team the tools they need to streamline administrative tasks, support employees, and make informed decisions with the OrangeHRM free and open source HR software.
    Learn More
  • 10

    sauercraft

    A minecraft clone thing on the cube 2 engine

    a minecraft clone in cube engine 2. it is going to utilize build 101 of cube 2 released on December 2nd 2008. currently being planned, any help is needed.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Stunt Marble Racers (aka Marbles 2) is a game "inspired by Marble Madness" where you race various tracks with a marble, either against the clock, against another player in splitscreen or agains up to 3 others in network.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    This system is designed to synchronize objects over network using a 1 server : n clients topology. In contrast to Object Replication system used in Zoidcom or RakNet this solution is developed to be very scalable using multiple threads/cpus=> MMO ready.
    Downloads: 0 This Week
    Last Update:
    See Project
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