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: 115 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: 52 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: 18 This Week
    Last Update:
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  • 4
    Risk
    Risk has been renamed to Domination.
    Downloads: 18 This Week
    Last Update:
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  • 5
    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: 14 This Week
    Last Update:
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  • 6
    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: 7 This Week
    Last Update:
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  • 7

    Thermos

    MinecraftForge Server Software implementing the Spigot/Bukkit API

    Minecraft Forge Server Software implementing the Spigot/Bukkit API, formerly known as Cauldron/MCPC.
    Downloads: 24 This Week
    Last Update:
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  • 8
    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: 5 This Week
    Last Update:
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  • 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: 1 This Week
    Last Update:
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  • 10
    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: 3 This Week
    Last Update:
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  • 11
    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:
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  • 12
    Shoddy Battle (later known as Pokémon Lab) is a Pokémon simulator created by Cathy and bearzly and first released in July 2007. It allows users to play Pokémon matches against other people online. Shoddy Battle was highly influential on the game of competitive Pokémon because it was free and open source, scalable (700,000 battles per month during its peak), user customisable and extensible, and it provided unprecedented statistical data on player skill and Pokémon usage trends. Visit the web site for more information.
    Downloads: 3 This Week
    Last Update:
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  • 13
    Panzer Combat II

    Panzer Combat II

    Computer-assisted miniature tank game.

    Panzer Combat II is a multi-player voice and webcam enabled computer-assisted distributed miniature wargame of World War II tank combat. Firing is done by placing a webcam behind the aiming unit. Distance to target is computed using computer vision. Action inside the tanks is performed on the computer screen while battlefield strategy is played on the miniature terrain. Both camps can use a different laptop or tablet, the game will interconnect. You can try it online : http://server.panzercombat.com/PCII_Web/move.htm Look at battle reports : http://www.flickr.com/photos/panzercombatii Or watch a demo : http://www.youtube.com/watch?v=WcjfV8Odtss 100% CLEAN : http://games.softpedia.com/progClean/Panzer-Combat-II-Clean-95530.html
    Downloads: 1 This Week
    Last Update:
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  • 14
    Pinewood Derby Race Track 2

    Pinewood Derby Race Track 2

    Pinewood Derby Race Management

    Race Track is a Pinewood Derby Race Management Application. This is Cub Scout Pinewood Derby Timer Gate software . This is a rewrite by Steve Powell to the original Race Track Written by Scott Lewis in sourceforge. It supports racer registration, heat scheduling, electronic timer integration, and sound effect playback. It is written in Java and runs on any Java enabled platform. It is written to support either Arduino, Micro Wizard or The Judge Electronic Gates. It also supports Race Results screen, Multiple COM ports and manually entered race times. A start sensor may be used as well.
    Downloads: 1 This Week
    Last Update:
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  • 15
    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: 1 This Week
    Last Update:
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  • 16
    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: 2 This Week
    Last Update:
    See Project
  • 17
    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: 1 This Week
    Last Update:
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  • 18
    CS:GO Multi Script

    CS:GO Multi Script

    Multi scripts for CS:GO that do just about everything

    I have not posted any of the code yet, I'm working on it locally then will push everything. This is not to be used in game (maybe deathmatch only :stuck_out_tongue:), but rather is meant to have some with the features that Java provides. I included all source so that you can see what I used. This is a great project to learn about global event listener, JRobot, JavaFX, etc... Most of the people said this just makes it harder to play the game, so it's not fantastic. The only thing I would say is worth getting banned over is the "camping" trigger bot and the crosshair overlay. The other features don't really provide an unfair advantage in my opinion. Either way, enjoy :)
    Downloads: 1 This Week
    Last Update:
    See Project
  • 19
    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: 1 This Week
    Last Update:
    See Project
  • 20

    drag0nius' Diablo 3 DpS Calculator

    Damage calculator and items comparison tool for Diablo 3

    Fully featured, standalone & platform-independent Java (JRE6) damage calculator/items comparison tool for Diablo 3. Be sure to check https://sourceforge.net/p/d3dpscalc/wiki/Home/ before asking questions. Language file is available, possible to include any language as long as somebody provides me with translation. Currently supported: - English - Polish
    Leader badge
    Downloads: 1 This Week
    Last Update:
    See Project
  • 21
    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:
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  • 22
    This is new reincarnation of all-known xNova project. In the "Regenesis" we want to summarize all best from space-MMRPGs such like Unificant Wars and OGame. All development is carried out with Java (Hibernate + J2EE) + Haxe + ExtJS.
    Downloads: 1 This Week
    Last Update:
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  • 23
    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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  • 24
    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:
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  • 25
    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: 0 This Week
    Last Update:
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