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
    Open Mahjong
    Implementation of the original Chinese board game of Mahjong using Hong Kong rules.
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    Downloads: 31 This Week
    Last Update:
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  • 2
    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: 15 This Week
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  • 3
    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
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  • 4
    Mobile Open-Source Software and Tools

    Mobile Open-Source Software and Tools

    Android, UIQ 3.0, Series 60 Edition 5 open-source software

    Android, Symbian UIQ 3.0 and Symbian Series 60 Edition 5 open-source software, tools, libraries and themes. Most notable the FX-602P / FX-603P Simulator and the HP-45 Emulator are hosted here.
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    Downloads: 29 This Week
    Last Update:
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  • Photo and Video Editing APIs and SDKs Icon
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  • 5
    Nesoid

    Nesoid

    NES emulator for Android phones

    This project is based on sources, published by original Nesoid developer, who in turn used code of GPFCE, forked from FCEUltra, currently incarnation of which is known as FCEUX. Help and suggestions are welcome. This project has been abandoned in favor of the RetroArch, another awesome free software emulator (which has much better NES support and is more actively developed): http://www.libretro.com/.
    Downloads: 16 This Week
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  • 6
    jose is a graphical Chess tool. >>> moved to https://peteschaefer.github.io/jose <<< You can store chess games in a database. You can view and edit games (including variations and comments). You can play against a plugged-in chess engine and use it for analysis. Features 3D board view.
    Downloads: 18 This Week
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  • 7
    x3d

    x3d

    X3D is the open-standard format for 3D graphics scenes on the Web.

    Extensible 3D (X3D) Graphics is a royalty-free International Standard for real-time interactive 3D graphics on the Web, providing unsurpassed interoperability for 3D communications on the Web. This project includes source for example X3D scene libraries and multiple X3D codebases produced by Web3D Consortium members. All open-source contributions are welcome.
    Downloads: 15 This Week
    Last Update:
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  • 8
    Snake 2D

    Snake 2D

    Simple single and multiplayer 2D snake game

    Simple single and multiplayer 2D snake game If you like it please drop a Like! :D
    Downloads: 23 This Week
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  • 9

    Europa Universalis Game Tools

    Europa Universalis 4 save game editor

    Java library and application to edit game files from all Clausewitz-engine games (EU3 and later, including EU4, Victoria 2, Hearts of Iron 3, EU: Rome, March of the Eagles, and Crusader Kings 2 and 3) and their saved games. Source code is now hosted at https://github.com/mmyers/eug. Sponsor on Patreon: https://www.patreon.com/user?u=60455822
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    Downloads: 41 This Week
    Last Update:
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  • 10
    Graphical interface to programs that play the game of Go and use the Go Text Protocol (GTP), such as GNU Go.
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    Downloads: 41 This Week
    Last Update:
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  • 11
    Chatty

    Chatty

    A Twitch Chat Client

    Chatty is a Twitch Chat Client for everyone who wants to try something different than the Webchat but doesn't want to miss out on many of the Twitch specific features.
    Downloads: 10 This Week
    Last Update:
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  • 12
    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: 14 This Week
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  • 13
    For people who like solitaire but don't want to wear glasses.
    Downloads: 11 This Week
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  • 14
    Neko Project II for Android

    Neko Project II for Android

    PC-98 emulator for Android phones

    This project is based on sources, published by someone with nickname sawada, who used code of Neko Project II. Help and suggestions are welcome.
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    Downloads: 37 This Week
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  • 15
    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: 12 This Week
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  • 16
    Origami Editor 3D

    Origami Editor 3D

    Virtual paper folding program

    Origami Editor 3D is an advanced paper folding simulator. It uses a what-you-see-is-what-you-get interface and operates with a geometric abstraction of the Yoshizawa-Randlett system. Anything from a simple airplane to John Montroll's omega star can be folded in this editor. Origami files created with the program preserve the entire folding process, and they can be exported as folding diagrams in PDF, animated GIF files, or even as standalone Java programs displaying the origami in a 3D viewer when opened. The main purpose of this program is designing origami, but if you only want to learn how to make some origami figures, there is a set of built-in example files that can help you. Currently, there are 34 example figures available. Please note that this project was created for fun and still is a work in progress. The Discussion forum is open for anyone who wants to report a bug or suggest a new feature. User Guide: http://origamieditor3d.sourceforge.net/userguide/en/index.html
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    Downloads: 20 This Week
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  • 17
    YSoccer

    YSoccer

    Retro style, multi-platform soccer game

    A new soccer game which intends to give a continuation to the funny and easy playable series of Sensible World of Soccer (aka SWOS). The source code is available under the GNU General Public License.
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    Downloads: 20 This Week
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  • 18
    The Neverhood Restoration
    Be warned this project was discontinued in 2013 and has not been updated in years.
    Downloads: 35 This Week
    Last Update:
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  • 19
    LocoNet over TCP
    Client-server based software that talks to Digitrax LocoNet. TCP server talks through a hardware interface (e.g. LocoBuffer) to LocoNet. (User interface) clients talk to that server.
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    Downloads: 34 This Week
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  • 20
    Connect Controller to PC

    Connect Controller to PC

    If you can't connect your controller to PC, this program will do it.

    Some Playstation DualShocks like 3,4 and 5 can't connect to PC but this program will change your controller to XBOX joystick and you can play games and control your pc with your controller. It is free and fast forever. Daily updates. ⚠️If Windows shows Unknown application error click "More Info" then click "Run Anyway".
    Downloads: 42 This Week
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  • 21
    Rails: an 18xx game system
    Rails is a Java game engine intended to play any of the 18xx series of turn-based board games For 3-6 players and set in the 19th century, these games allow players to step into the shoes of the robber barons and railroad tycoons of the time period..
    Downloads: 7 This Week
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  • 22
    Utility for translating language packs used in games into a different language. Supports over 50 games, with more games added through small plugins. Simple and easy-to-use interface, and totally free.
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    Downloads: 33 This Week
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  • 23
    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/.
    Leader badge
    Downloads: 8 This Week
    Last Update:
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  • 24
    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: 7 This Week
    Last Update:
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  • 25
    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: 30 This Week
    Last Update:
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