Open Source Java Game Development Frameworks

libGDX is a cross-platform Java game development framework based on OpenGL (ES) that works on Windows, Linux, macOS, Android, your browser and iOS. libGDX provides a well-tried and robust environment for rapid prototyping and fast iterations. libGDX does not force a specific design or coding style on you; it rather gives you the freedom to create a game the way you prefer. Publish your games on Windows, macOS, Linux (including the RPi!), Android, iOS, and HTML5, all with the same code base. libGDX comes with batteries included. Write 2D or 3D games and let libGDX worry about low-level details. Heavy emphasis is put on avoiding garbage collection for ART/JavaScript by careful API design and the use of custom collections. libGDX is a well proven and reliable framework with a sound base and documentation. Furthermore, there are plenty of games built on top of libGDX, many of which are open source.

Arianne is a multiplayer online engine to develop turn based and real time games, providing a simple way of creating the game server rules and clients like our MORPG Stendhal. Our engine Marauroa uses Java and SQL for hosting hundreds of players on a solo host. Stendhal is a fun friendly and free multiplayer online adventure game with a huge and rich world. With hundreds of NPCs and different quests, features like the Travel log and achievement system keep track of progress. Thousands of creatures are ready to fight, above and below ground, and as players level up they can compare themselves on a detailed stats website. The engine Marauroa provides a simple way of creating games on a portable and robust server architecture. Marauroa manages the client server communication and provides an object orientated view of the world for game developers. It handles database access in a transparent way to store player accounts, character progress and the state of the world

lwjglbook-leg is the companion code repository for the “3D Game Development with LWJGL 3” book, offering a practical learning path for building a 3D game engine in Java using the Lightweight Java Game Library (LWJGL). It covers the implementation of a modern OpenGL-based engine from scratch, guiding readers through key concepts such as rendering, lighting, animation, input handling, and scene management. This project serves as an excellent educational resource for Java developers interested in graphics programming and game development.

JSettlers2 is a web-based version of the board game Settlers of Catan written in Java. This client-server system supports multiple simultaneous games between people and/or AI bots. Originally written by Robert S Thomas as an AI dissertation (http://sourceforge.net/projects/jsettlers). The active source code is hosted at https://github.com/jdmonin/JSettlers2 including full history; the sourceforge CVS is historical up to 2012-09-28.

Tower of Zaldagor is a roleplaying game (RPG) where you need to use your wits and skills to complete challenges. Blade Kahn, a king of Sonthalas, has lost his daughter to the Great White Dragon: Zaldagor. She has been kidnapped by humanoids. You have been picked among the elite to return his daugther safely. Engage into an epic story where Gods change the future and demons interfere with the present. Download and discover the beginning of an epic story. The Android version is now available! Find it here: http://market.android.com/details?id=toz.android See a promo video here: http://www.youtube.com/watch?v=Rh7GGlk5m30 Follow Sarquah on Twitter about the development: http://www.twitter.com/sarquah87

Ethanon is a 2D game engine focused on the recent video cards for hardware acceleration and shader effects. The engine provides high-quality light an shadow effects with an easy visual interface and a simple and direct scripting system.

eAdventure (formerly <e-Adventure>) is an authoring tool for the creation of point-and-click games, especially designed for educational purposes. eAdventure is SCORM compatible so eAdventure games can be integrated with LMS like Moodle. More info at: http://e-adventure.e-ucm.es

This simple application written in java decodes the login credentials stored in the file named "lastlogin" in your minecraft folder. DEPRECATED AFTER MC 1.6

All-In Hon ModManager is a simple software to manage and control Heroes of Newerth Mods and Addons for final users (gamers).

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!

Open source 3D physics and dynamics engine and library written in pure Java. This is a Java port of ODE / OpenDE (Open Dynamics Engine). THIS PROJECT HAS BEEN MOVED TO A NEW LOCATION: http://www.ode4j.org

A 2d rpg game engine created to be ease of use. Built in Scala and libgdx. Also our community forums http://rpgboss.forumatic.com

Boss Engine is a graphical API for writing low-resolution 8-bit color applications. It offers easy to use functions for handling graphics, basic i/o and more. Screen access is performed through virtual framebuffers that allow direct read/write access to indexed color screen data. API is coded entirely with native libraries. No third party libraries required.

This started when one of my friends said I couldn't possibly make a full blown video game in Java, and know I have made Minecraft in Java and it consists of an inventory, blocks, and more!

BehaviorSim is an educational tool which allows users to develop and exercise behavior-based applications by setting up entities, behaviors and other primitives without involving significant programming effort.

3d action adventure. Developer playground: [ http://callie.sourceforge.net/jws/jws.jnlp ], Forum: [ http://www.java-gaming.org/index.php/topic,24416.0.html ], GitHub: [ http://github.com/shlax/Callie/ ]

jAMAL is a Java-based reimplementation of the AMOS Animation Language (AMAL).

Galactic strategy Open Source browsergame. Replacement of the former game Net-Assault.

Habanero3d is a object-oriented 3d game engine written in C++, OpenGL, and GLSL with set of additional tools (written in number of languages), to make developers' life easier. Habanero3d is targeted for indie games, and is in development.

Kochol Game Engine(KGE) is an object-orianted hardware accelerated 3D Game engine. Easy to use and powerful engine for cutting edge games.

RS NIO API is a socket engineering server which uses the NIO reactor pattern.

A little framework for building 2d games in java

The AdventureMap peripherals addon for ComputerCraft gives players the ability to create stunning adventure maps with custom teleports, block spawning, explosions, and much, much more.

Agle means ANOTHER GAME LIBRARY and ENVIRONMENT Agle has a java client and a c++ linux server

A Java based Game Engine, using LWJGL libraries for OpenGL calls. It's created by Rudolf Horváth, with the help of András Schmidt.