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

  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    Build gen AI apps with an all-in-one modern database: MongoDB Atlas

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    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity.

    Freshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
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  • 1
    TripleA Maps

    TripleA Maps

    A collection of all maps and games made for the TripleA game engine

    http://www.triplea-game.org/
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    Downloads: 218 This Week
    Last Update:
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  • 2
    Crossfire RPG game

    Crossfire RPG game

    Cooperative multiplayer graphical RPG and adventure game

    Crossfire is a free, open-source, cooperative multi-player RPG and adventure game. Since its initial release, Crossfire has grown to encompass over 150 monsters, 3000 areas to explore, an elaborate magic system, 14 races, 16 character classes, and many powerful artifacts scattered far and wide. Set in a fantastical medieval world, it blends the style of Gauntlet, NetHack, Moria, and Angband.
    Downloads: 64 This Week
    Last Update:
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  • 3
    MegaMek
    MegaMek is a networked Java clone of BattleTech, a turn-based sci-fi boardgame for 2+ players. Fight using giant robots, tanks, and/or infantry on a hex-based map. Development currently occurs on GitHub (see https://github.com/MegaMek). This SF page remains as a mirror and archive of the old issue trackers. The trackers are currently locked and new issues should be created on the GitHub page.
    Downloads: 31 This Week
    Last Update:
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  • 4
    Colossus is a Java clone of the boardgame Titan, a turn-based fantasy wargame for 2-6 players. Each player moves stacks of creatures around a strategic board, recruiting more creatures and fighting enemy stacks on tactical maps.
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    Downloads: 12 This Week
    Last Update:
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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.
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  • 5
    2D isometric MMORPG using the SDL framework. Daimonin offers a free public server at https://www.daimonin.org . A Unity client is also in active development.
    Downloads: 3 This Week
    Last Update:
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  • 6
    Risk
    Risk has been renamed to Domination.
    Downloads: 2 This Week
    Last Update:
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  • 7
    LandsDiscordBot

    LandsDiscordBot

    Adds Discord Functionality to Lands.

    This plugin adds Discord functionality to the spigot plugin Lands. It allows land owners to create a channel for their land so they can chat from Discord with their land members online at the Minecraft server. Also you can view top lands in Discord, receive land and war notifications and more to come.
    Downloads: 9 This Week
    Last Update:
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  • 8
    MechFight
    MechFight is a new implementation of the Amigagame Mechforce. In this tactical game groups of warriors fight with heavy machines (up to 100 tons), until defeat or even death in a thermonuclear explosion of their engines.
    Downloads: 5 This Week
    Last Update:
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  • 9
    JayMontana36 Pre-Built Minecraft Servers

    JayMontana36 Pre-Built Minecraft Servers

    Free Minecraft Servers tweaked for a lag-free experience!

    Free Minecraft Servers that come with a few of the most popular used plugins pre-installed by default, all preconfigured for a lag-free experience! - Optimized for low-end systems (beast-like on medium to high end systems). - Low RAM usage/requirements/consumption. - CrossCompatible between many different versions of Minecraft. - One Server Supports all 1.4.x, 1.5.x, 1.6.x, 1.7.x, 1.8.x, 1.9.x, 1.10.x, 1.11.x, 1.12, 1.12.2 clients all at the same time. - Fully Supports Linux, Windows, and Mac OS X. - Officially supports the MineOS Web UI created and owned by Will Dizon (this project however, is not affiliated with the MineOS Web UI nor William Dizon).
    Downloads: 2 This Week
    Last Update:
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  • AI-generated apps that pass security review Icon
    AI-generated apps that pass security review

    Stop waiting on engineering. Build production-ready internal tools with AI—on your company data, in your cloud.

    Retool lets you generate dashboards, admin panels, and workflows directly on your data. Type something like “Build me a revenue dashboard on my Stripe data” and get a working app with security, permissions, and compliance built in from day one. Whether on our cloud or self-hosted, create the internal software your team needs without compromising enterprise standards or control.
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  • 10
    An alternative/custom Minecraft server, written in Java, compatible with the original protocol. OpenCraft is built upon Apache MINA, SLF4J, Jython and XStream. The aim is to have features not in the official server distribution, like antigrief/scripting.
    Downloads: 2 This Week
    Last Update:
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  • 11
    Arcanium
    Arcanium is a fantasy multiplayer realtime strategy game. It has been developed as a student project at university and is now an open source project.
    Downloads: 1 This Week
    Last Update:
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  • 12
    Chess

    Chess

    A simple 2D-Chess

    A 2D-Chess with many features, such as a multiplayer server and many others. It will also show you all movement possibilites you have. Playing against Computer is in development
    Downloads: 1 This Week
    Last Update:
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  • 13
    O projeto tem como objetivo promover o estudo e o desenvolvimento dos componentes para uma engine genérica de jogos. O foco não é produzir uma engine comercial, mas sim promover o estudo de conceitos baseados em OO para games.
    Downloads: 1 This Week
    Last Update:
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  • 14
    SuperLauncher is an alternative launcher for Minecraft
    Downloads: 1 This Week
    Last Update:
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  • 15
    Thump (BattleTech MUX Map Creator)

    Thump (BattleTech MUX Map Creator)

    Map creator for the BattlleTech MUX

    Map creator for the BattlleTech MUX
    Downloads: 1 This Week
    Last Update:
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  • 16
    Apozh

    Apozh

    A funny game for a good company similar to karaoke

    Apozh is a game similar to karaoke for 2 or more players. One player sings a song while the second player should not hear it, then the song is turned backwards, and the second player tries to sing it in the 'reversed' state. Once the second player finished singing, his recording is also turned backwards. Then the second player tries to guess, what was the first player's song. A sound card, microphone and speakers are required to play this game.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 17
    AirPirates

    AirPirates

    Steampunk airplanes dogfighting with zeppelins

    AirPirates - Krazy Kraut is the latest campaign in a steampunk dieselpunk teslapunk setting with amazing airplanes fighting zeppelins.
    Downloads: 0 This Week
    Last Update:
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  • 18
    Bedroom battle tanks is a JGame based 2D tank shooter created as an entry for a game development competition.
    Downloads: 0 This Week
    Last Update:
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  • 19
    STILL IN EARLY DEVELOPMENT: OUYA game inspired by the original "Bomberman". Details: 2D, 4 player support.
    Downloads: 0 This Week
    Last Update:
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  • 20

    Bronze to Masters Evaluation

    Evaluates Starcraft 2 games with respect to multiple macro aspects.

    The Bronze to Masters Evaluator (B2Meval) evaluates Starcraft 2 games with respect to multiple macro aspects. These are worker and supply count at specific times, expansion timings, building timings, as well as research and upgrade timings. The B2Meval is a SC2gears plugin. Hence, SC2gears is required. The B2Meval shows specific values of unit counts and timings that are recommended by filtersc's macro tutorials. Please, refer to filtersc's macro tutorials on teaamliquid.net or YouTube.com for more information about these values.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    BukkitUI

    BukkitUI

    A Simple and Easy to Use User Interface for Private Bukkit Servers

    BukkitUI is a user interface replacement for the Bukkit console. It makes life as a server owner much easier, as it requires you to press a few buttons, until you have a running server! BukkitUI is written in Java, and is designed to be cross-platform, so Linux users (like me) have as much a chance at running a Bukkit server as Windoze users. BukkitUI has following
    Downloads: 0 This Week
    Last Update:
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  • 22
    Categories Game (państwa-miasta)
    Categories is a game which players guess name of countries, cities, things, etc. Because this game was the moved with the paper on the computer screen, you have a unique opportunity to play with your friends in a network.
    Downloads: 0 This Week
    Last Update:
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  • 23

    Charlotte's Utilities

    Charlotte's Utilities mod for Minecraft Forge made by Sharshar

    Charlotte's Utilities is my first adventure into modding Minecraft. I wanted to have some extra utilities and things for my server that I couldn't find in other mods, or if I could I was able to think of a different way that I would prefer to implement them. At its core, this mod pack is just a collection of utilities that I feel improve the game experience. Everything is fully configurable in the config file so you can change, enable, or disable whatever you feel is best for you! The mod has quickly developed into one that's aimed primarily at the builders of the Minecraft community, and I plan to expand on that idea going into the future. My goal is to provide new, unique, and easy ways to allow players to construct whatever comes to their mind. I take feedback very seriously and if you have a good idea I won't hesitate to implement it. Development of Charlotte's Utilities is made possible by Full Effect Hosting
    Downloads: 0 This Week
    Last Update:
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  • 24
    CockFight
    This is a multiplayer game where two teams, a chicken team and human team, battle each other for survival. Players control either Cocks/Roosters or Humans. The goal for the Cocks is to destroy the factory while the Humans' goal is to capture the Mother Hen.
    Downloads: 0 This Week
    Last Update:
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  • 25
    You take a role as a CEO in a computer company. That company builds computers and sells them, you can even build consoles, PDAs, mobile phones, etc.
    Downloads: 0 This Week
    Last Update:
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