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

    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: 19 This Week
    Last Update:
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  • 2
    AndEngine

    AndEngine

    Free Android 2D OpenGL Game Engine

    AndEngine is a Java-based, open-source 2D game engine for Android, designed to make mobile game development easier by wrapping OpenGL (GLES) under a higher-level API. It abstracts much of the complexity of directly using OpenGL, letting developers more quickly build games with sprites, tilemaps, physics (via extensions), animations, and input handling, all within the Android ecosystem. Because it's tailored for Android, AndEngine integrates with typical Android project structure and lifecycle, although historically it was more aligned with Eclipse — meaning some adaptation might be needed for modern Android Studio projects. It enjoys a substantial community, many forks and extensions (for physics, tilemaps, multiplayer, live wallpapers, etc.), which increases its versatility — from simple casual games to more feature-rich 2D titles.
    Downloads: 2 This Week
    Last Update:
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  • 3
    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
    Last Update:
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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
    Last Update:
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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: 16 This Week
    Last Update:
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  • 6
    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
    Last Update:
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  • 7
    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: 46 This Week
    Last Update:
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  • 8
    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: 9 This Week
    Last Update:
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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: 9 This Week
    Last Update:
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  • 10
    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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  • 11
    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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  • 12
    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
    Last Update:
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  • 13
    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: 11 This Week
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  • 14
    SolitaireCG

    SolitaireCG

    Solitaire Card Games for Android™

    SolitaireCG is an adaptation of Ken Magic's "Solitaire" for devices with few hardware buttons. SolitaireCG stands for Solitaire Card Games and is a software application for Android™. Solitaire Card Games include Klondike (regular solitaire), Vegas, Spider, Golf, Freecell, Forty Thieves, TriPeaks, and variations of these games. Key changes against the original are outlined at: https://solitairecg.sourceforge.io/ The changes fix bugs, add games and portait mode, and enable card dealing and playability in spider. New hi-res graphics have been added to the original card graphics to take advantage of today's larger, higher resolution screens. Source code available under Apache license 2.0, see git repository.
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    Downloads: 37 This Week
    Last Update:
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  • 15
    GOdroid is an Android application to play the strategic board game Go against the GPL Go engine GNU Go. It contains a Go board UI and minor changes to GNU Go. This site contains the sources for the UI and the (few) changes to the GNU Go sources. Translations contributed by - Chinese: Jean Lea and Kid Wong - Russian: Шмойлов Валерий - Danish and Norwegian: Michael Berthelsen - Polish: Piotr Goliasz - Finnish: Daniel Landau - Romanian: Mircea Damian - Spanish: Pol Urós Guardiola - Portuguese (Brazil): Igor Costa - Italian: Alessio Gerola - Hungarian: Téglás Zoltán, review: András Oláh - French: Laurent L Volunteers for providing additional translations are very welcome - it's easy, just fill out a google docs/drive spreadsheet.
    Downloads: 11 This Week
    Last Update:
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  • 16
    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: 6 This Week
    Last Update:
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  • 17
    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
    Last Update:
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  • 18
    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: 19 This Week
    Last Update:
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  • 19
    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
    Last Update:
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  • 20
    Mobile Chess and Flash Chess
    Mobile Chess (for Java ME) and Flash Chess (for Web) with Strong Chess AI, see http://mobilechess.sourceforge.net/. Java Applet Chess and Ajax Chess are also available. Mobile Chess is sponsored by Chess Wizard now, see http://www.chess-wizard.com/.
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    Downloads: 8 This Week
    Last Update:
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  • 21
    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: 11 This Week
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  • 22
    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
    Last Update:
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  • 23
    JBoardGames
    Collections of simple Java Board Games No third party libraries. Now avaiable: - Chess 1.0.18 featuring Human vs Human Human vs Computer Computer vs Computer With puzzles. -Quattro 1.2.3 Currently available: Human vs Human Human vs Computer Computer vs Computer -Checkers 1.0.9 featuring Human vs Human Human vs Computer Computer vs Computer -Backgammon 1.0.2 featuring Human vs Human Human vs Computer Computer vs Computer - Go 1.0.1 Human vs Human Human vs Computer Computer vs Computer -Dominoes 1.0.1 featuring Human vs Human Human vs Computer Computer vs Computer - Mill 1.0.5 featuring Human vs Human Human vs Computer Computer vs Computer - Battleship 1.0.2 Human vs Computer
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    Downloads: 31 This Week
    Last Update:
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  • 24
    Talisman is an offline area builder written in Java for SMAUG 1.4a MUDs.
    Downloads: 17 This Week
    Last Update:
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  • 25
    Risk
    Risk has been renamed to Domination.
    Downloads: 6 This Week
    Last Update:
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