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

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  • 1
    FXGL

    FXGL

    Java/JavaFX/Kotlin Game Library (Engine)

    No installation or setup required. "Out of the box": Java 8-17, Win/Mac/Linux/Android 8+/iOS 11.0+/Web. Simple and clean API, higher level than other engines. Superset of JavaFX, no need to learn new UI API. Real-world game development techniques, entity-component, interpolated animations, particles, and many more. Games are easily packaged into a single executable .jar or native images. Any 2D game (side-scroller/platformer/arcade/RPG). Any business application with complex UI controls/animations. Hobby/academic/commercial projects. Teaching/learning/improving game development skills.
    Downloads: 2 This Week
    Last Update:
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  • 2
    Luck Perms

    Luck Perms

    A permissions plugin for Minecraft servers

    LuckPerms is a widely used open-source permissions management plugin for Minecraft servers that allows administrators to control what actions players can perform within the game. The plugin provides a flexible system for creating user groups, assigning permissions, and defining roles that determine access to commands, features, and gameplay mechanics. Designed for performance and scalability, LuckPerms can handle large multiplayer servers and complex permission hierarchies while maintaining fast response times. Administrators can configure permissions using command-line tools, configuration files, or a web-based editor that simplifies management of large permission systems. The plugin also supports multiple storage backends such as local files, SQL databases, and other data systems, allowing server networks to synchronize permissions across multiple servers.
    Downloads: 2 This Week
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  • 3
    Phosphor (for Fabric)

    Phosphor (for Fabric)

    A Fabric mod designed to improve the performance of Minecraft

    Phosphor is a free and open-source Minecraft mod (under GNU GPLv3) aiming to save your CPU cycles and improve performance by optimizing one of Minecraft's most inefficient areas-- the lighting engine. It works on both the client and server and can be installed on servers without requiring clients to also have the mod. The mod is designed to be as minimal as possible in the changes it makes, and as such, does not modify the light model or interfaces of vanilla Minecraft. Because of this, Phosphor should be compatible with many Minecraft mods (so long as they do not make drastic changes to how the lighting engine works.) If you've ran into a compatibility problem, please open an issue.
    Downloads: 2 This Week
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  • 4
    SpongeForge

    SpongeForge

    A Forge mod that implements SpongeAPI

    A Forge implementation of the Sponge API. SpongeForge uses Gradle as its build system. The repo includes the Gradle wrapper that will automatically download the correct Gradle version. Local installations of Gradle may work but are untested. To execute the Gradle wrapper, run the ./gradlew script on Unix systems or only gradlew on Windows systems. In order to build SpongeForge you simply need to run the gradlew command. On Windows systems you should run gradlew instead of ./gradlew to invoke the Gradle wrapper. SpongeForge is the implementation of the Sponge API on the Minecraft Forge platform. Recommended for running plugins together with Forge mods. The purpose of the Sponge project is to create a plugin development framework for Minecraft: Java Edition. Sponge is being created by a global community, and its open-source nature means anyone can participate.
    Downloads: 2 This Week
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  • 5
    A Java-based Gameboy and Gameboy Color emulator for mobile devices and PCs. If you want to play Gameboy games on your mobile phone you should try this emulator. For more information see the Wiki http://sourceforge.net/apps/mediawiki/javagb/index.php.
    Downloads: 17 This Week
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  • 6
    Strong Java Chess Engines Game

    Strong Java Chess Engines Game

    SJCE - free portable cross-platform graphical chess game, 100% Java.

    SJCE - Strong Java Chess Engines, free portable cross-platform graphical chess game, 100%-pure Java. Support with including many best free/open-source java xboard/uci chess engines. It is possible to play both White and Black. It is possible to play Human to Human, Human vs Engine, Engine vs Engine. Simple and intuitive GUI - Graphical User Interface. Tested on Windows/Linux. Need jre1.8 - https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html. Source - https://github.com/harp077/sjce If you like this - put a star on https://github.com/harp077/sjce/ for support project please.
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    Downloads: 12 This Week
    Last Update:
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  • 7

    MegaMekLab

    Create meks and more!

    MegaMekLab is a Mek creator program. Currently it can create Meks, vehicles, battlearmor, and conventional infantry. It can also print PDF record sheets for almost all Battletech units. Created units can also be exported to formatted text or html for posting online.
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    Downloads: 18 This Week
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  • 8
    A -quite ambitious- project to create a functional Doom source port in pure Java, trying to keep as close as possible to the original source code while at the same time streamlining it into a more OO and Java-friendly form.
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    Downloads: 27 This Week
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  • 9
    Mediocre is a Java-based chess engine, implementing features like LMR, SEE, history and killer moves heuristics, transposition tables, internal iterative deepening, PVS search etc.
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    Downloads: 10 This Week
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  • 10
    Dungeon Shell is a shell for D20 Dungeon Masters. Simple commands allow DM to manage a game session and track characters and monsters statistics. It is written in Java (1.4.0 at least). Data is stored in XML and you can script it with j[p]ython.
    Downloads: 48 This Week
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  • 11
    chessPDFBrowser

    chessPDFBrowser

    Chess application whichs allows working with chess PDF books and PGNs.

    Chess application which allows working with PDFs and PGNs. You can work with the chess games of the PDF and edit their tree of variants. Graphical environment. Standard PGN TAGs. PGN comments. Ocr like (Fen string detection from chess board position images). Connection to Uci chess engines (like stockfish). Position analysis, full game analysis. You can now play games against uci engines. pdf2pgn command line command included. Detailed documentation. Multilanguage currently support for English, Spanish and Catalan. Dark mode option. JDK-17 compatibility You will find more about it at this web sites: https://chesspdfbrowser.com?origin=sourceforge https://www.frojasg1.com:8443/downloads_web/web/html/chessPdfBrowser.html?origin=sourceforge
    Downloads: 26 This Week
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  • 12
    DynamicClient (Minecraft)

    DynamicClient (Minecraft)

    A Hack Client created from curseforge creators since 2021

    Dynamic Client is a minecraft hacked client that improve's the experience of the player, It has mods that was used for testing anti-cheats of servers but we changed it to be hacked client because making a client just to test anti-cheats is Boring. Announcement: 1.9.11 has been released! NOTE: This requires you to have a Minecraft launcher such as TLauncher to use the hack client. it also shows how anyone can create their own client, without coding as you only need ac-credit the mod creators. Having Issues? Check the installation Guide > https://sites.google.com/view/dynamic-client/about/installation?authuser=0 Website > https://sites.google.com/view/dynamic-client Github > https://github.com/JamStudios/DynamicClient Gitlab > https://gitlab.com/JamStudiosCorp/dynamicclient/DynamicClient
    Downloads: 45 This Week
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  • 13
    sanguo
    该软件主要是为了改善三国风云玩家的游戏体验,把玩家们从枯燥无味又繁重的点击劳动中解放出来。此工具可免费下载,绝无后门、木马,不信者可用防火墙监测访问的地址。
    Downloads: 15 This Week
    Last Update:
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  • 14
    Magic Assistant
    Magic Assistant is multi-platform application for "Magic: The Gathering" players. Includes Card Browser, Library Organizer, Deck Builder and MTG Tournament Manager. Comes with MTG cards database and allows web updates. See home page for details. Sadly this project is no longer active, it is up for adoption.
    Downloads: 7 This Week
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  • 15
    Blizzaga Media library is a tool for generating playlists for use with external media players. A maximum file size is specified for a playlist, allowing the user to restrict generation to the capacity of their device. Currently supports PSP file system.
    Downloads: 23 This Week
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  • 16
    Game framework including 1, 2 and multi-players modes which doesn't involve any central server, so peer-to-peer multi-players equivalent! Java environment (v. 1.5+ @ java.sun.com) Including a multi-platform API. Imaging capabilities provided by Java Advanced Imaging (JAI) and 3D support provided by the LWJGL (www.lwjgl.org) API.
    Downloads: 23 This Week
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  • 17
    A cross-platform Duke3D (Duke Nukem 3D) port which provides many new features for mod authors, including an enhanced scripting system and OpenGL renderer. Go to http://www.eduke32.com for downloads and http://bit.ly/dn_3d to get the game!
    Downloads: 8 This Week
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  • 18
    Free Mars

    Free Mars

    Turn based free strategy game about colonizing Mars.

    It is the year 2077, for the first time in its history mankind has finally began the colonization of another planet. Will the pioneers from Earth succeed in colonizing their new home or will they fail to survive against the harsh and inhospitable conditions of the Red planet? Free Mars is a turn based strategy game about colonizing Mars.
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    Downloads: 7 This Week
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  • 19
    Space-Faring
    Space-Faring is a 2D single-player turn-based space strategy game. The strategy revolves around 4X space conquest. Some inspiration came from Master of Orion and Outpost. The game is written in Java and is still under development.
    Downloads: 10 This Week
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  • 20
    Ares
    Ares stands for Aural RPG Experience System. It is used to create and play music lists, background sounds or special sound effects for different situations during (pen & paper) role-playing.
    Downloads: 12 This Week
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  • 21
    Tyrant is a graphical roguelike fantasy adventure game. It features intricate randomly generated landscapes, towns and dungeons. It is written in Java with a highly extensible game engine.
    Downloads: 10 This Week
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  • 22
    xChess is a multiplatform graphical chess user interface written in Java for numerous chess engines. It intends to support multiple chess protocols to serve as a front end for many existent chess engines.
    Downloads: 18 This Week
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  • 23
    Kendo Tournament Generator

    Kendo Tournament Generator

    Tool for managing a kendo tournament

    This software manage different kendo tournaments: from local simple championships to professional tournaments with high number of teams. The software can manage the registration of competitors, team generation, design of the tournament (simple, championship, manual, ... ). Also allows the creation of accreditations, list of teams and other documents in PDF useful for manage a real kendo tournament. Finally, it allows to obtain some statistics and feedback from each team and competitors.
    Downloads: 11 This Week
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  • 24
    An entertaining Sokoban game with nice 3D graphics available for Windows, Linux & Mac. Features different skins & workers, several level sets, resume & replay, improved mouse/keyboard control, audio etc.
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    Downloads: 31 This Week
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  • 25
    Talisman is an offline area builder written in Java for SMAUG 1.4a MUDs.
    Downloads: 17 This Week
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