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.

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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/
    Leader badge
    Downloads: 195 This Week
    Last Update:
    See Project
  • 2
    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: 121 This Week
    Last Update:
    See Project
  • 3
    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, 13 races, 15 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: 60 This Week
    Last Update:
    See Project
  • 4

    Gametable

    Multi-user whiteboard emphasizing simplicity.

    Gametable (also known as GamenianTabele), is a Java-based shared whiteboard and chat client. It is designed primarily to provide an online tabletop interface. Draw directly, or place images, that all connected users can see and manipulate. RNG/dice functions supported, infinite table size, a few Z-order layers, pointer tools visible to everyone connected, stand along host server, and basic tagging and drawing tools. It specializes in simplicity, virtually no learning curve, and ease of use. Shared image files auto-propagate to other users (and only images, no other file type will propagate), which allow them to use a local cache to view shared spaces.
    Downloads: 11 This Week
    Last Update:
    See Project
  • MongoDB 8.0 on Atlas | Run anywhere Icon
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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: 11 This Week
    Last Update:
    See Project
  • 6
    Risk
    Risk has been renamed to Domination.
    Downloads: 7 This Week
    Last Update:
    See Project
  • 7
    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.
    Leader badge
    Downloads: 9 This Week
    Last Update:
    See Project
  • 8
    Planetmule
    Free-to-play multiplayer version of the 8-bit classic M.U.L.E.
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    Downloads: 28 This Week
    Last Update:
    See Project
  • 9
    mod_MumbleLink

    mod_MumbleLink

    Positional Audio Communication for Minecraft with Mumble

    A Mod so that Minecraft now natively supports Mumble's positional audio feature. This means: Directional and positionally attenuated VOIP in relation to the game world. Please visit the Forum for information about the newest Version! Main Forum-Thread: http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1272675 TheSkorm's Fork on GitHub: https://github.com/TheSkorm/mod_mumblelink Mumble: http://mumble.sourceforge.net Donations are greatly appreciated: https://sourceforge.net/donate/?user_id=2370023
    Downloads: 2 This Week
    Last Update:
    See Project
  • Build Securely on AWS with Proven Frameworks Icon
    Build Securely on AWS with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
    Download Now
  • 10
    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: 5 This Week
    Last Update:
    See Project
  • 11
    Human AI Net

    Human AI Net

    a Human and Artificial Intelligence Network

    We are going to teach eachother how to build AI and new kinds of game objects in this network using intuitive dragAndDrop. Its going to be a space for experimenting with fun and useful tools in new ways. Version 0.8.0 has some advanced components that will be working soon. The plan is a massively multiplayer space where we design, evolve, and play with game objects and do AI research together which controls those game objects along with directly playing the games. The main data format is, from xorlisp which is also in progress, immutable binary forest nodes, so if millions of people build that together nobody can damage or change anyone else's data since its all constant. You dont change variables. You create new data that points at existing constant data, as deep as you need it. I have mindmap lists, definitions, and 2 editable properties working that way with 2 kinds of event listeners that work locally. Its not a networked system yet, but the datastructs are ready to scale with it.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 12
    Minecraft Name Checker

    Minecraft Name Checker

    Minecraft Name Availability Checker

    A Minecraft tool that checks to see if an account name is available or currently taken. The program is written entirely in Java and exported to an executable. A text file (one name per line) can also be read and checked. An output file "available.txt" will be created with usable names in the same directory as the selected read file.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 13
    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: 3 This Week
    Last Update:
    See Project
  • 14

    Thermos

    MinecraftForge Server Software implementing the Spigot/Bukkit API

    Minecraft Forge Server Software implementing the Spigot/Bukkit API, formerly known as Cauldron/MCPC.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 15
    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: 2 This Week
    Last Update:
    See Project
  • 16
    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:
    See Project
  • 17

    Bengine

    Free strategy browsergame engine.

    Galactic strategy Open Source browsergame. Replacement of the former game Net-Assault.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 18
    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:
    See Project
  • 19

    FU-18-newsuperyoshi

    Fly, bomb, shoot sh*t.

    FU-18 is an open source, micro-transactioned arcade style game. If you would like to join the project, shoot me an email at newsuperyoshi@icloud.com and I'll get back to you.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 20
    MCSyncing to keep MC up to date.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 21
    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: 1 This Week
    Last Update:
    See Project
  • 22
    A Rich java interface for playing the online strategy game Strategic Domination(tm) http://www.strategicdomination.com/. DISCLAIMER: Stratigo Domingo is not sanctioned by strategicdomination.com and is not affiliated with strategicdomination.com.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 23
    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
  • 24
    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:
    See Project
  • 25
    Multiplayer game based on the open free game http://www.fortressfigures.com/zombieplague/. Server implemented with twisted framework and client will use android
    Downloads: 0 This Week
    Last Update:
    See Project
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