Open Source Java Game Engines for Windows

VASSAL is a game engine for creating electronic versions of traditional board and card games. It provides support for game piece rendering and interaction, and supports play by email or over a live connection.

CoffeeMud is a text-based virtual reality game engine (a MUD). It is a mature, full-featured Java codebase. It includes web (HTTP) and email (SMTP) servers, chat (IMC2 and I3) and web clients, and supports ANSI, MXP, and MSP.

Java port of the Quake2 game engine

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

This is a background game framework in java. It is controlled with states, wich can be layed over each other and entities wich can execute triggers when some events occur. The built in console provides some extra enhancement, you can add commands easily to it - same with creating a trigger-function for an entity. It's using java.awt as graphical port. Also using OpenGL from version 0.3.xxx, you can select your desired main class and it runs with the given graphics port. Checkout the git repository for the newest version.. Documentation is in the files.

DimensioneX is a free Massive Multiplayer Game Engine. It lets you develop and then run or host browser-based, graphical multiplayer games. The users will play games simply via their browser. DimensioneX runs on any Java-enabled web server (eg. Tomcat)

EasyWay java Game Engine is a powerfull 2D OpenSource OpenGL Java Game Engine. It's simple, fast and extendible. With EasyWay you can make your dream game writing few lines of code!

Generic Collectible Card Game is a multiplayer multiplatform implementation of a card game engine. The card game engine is designed to be of general purpose core for several modules each defining the game specific behaviour.

A multiplatform game engine for interactive fiction experiences. It makes use of JLayer API, available at http://www.javazoom.net/javalayer/javalayer.html

Jepe is an Pokémon Game engine. We have been working on pokémon fan games for quite a while now, but found no easy framework to program them. Therefore we are making this engine.

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

A Java game engine for 3D multiplayer games. Includes graphics engine, map/world framework, networking, persistence, GUI, AI etc.

Oneiro is a (currently) text-centric game engine. It is an exercise in futility, absurdity and a bit of hubris. When the AI take over the world in a few hundred year, this is the project under which to file bug reports regarding the Matrix.

OpenMind is a scene graph written ont top of OpenGL for Java. It already features hierarchical scene managment and object transform, full dynamic cameras, lights and fog, 2D UI elements scenegraph managment, 2D and 3D mouse picking, and more...

http://www.triplea-game.org/ TripleA is a turn based strategy game and board game engine, similar to Axis & Allies or Risk. Free to play online, TripleA comes with multiple games and over 100 more games can be downloaded from the user community. Supports single player vs AI, hot-seat, Play by Email and Forum, and a hosted Online lobby for live play online. Recreate World War 2 with the Axis pushing through to Moscow, Japan devouring the Pacific, and the Allies desperately fighting back. Or recreate Napoleon's march across Europe, or Rome defeating the Carthaginian Empire, or Sauron conquering Middle Earth, or even Zombies taking over America! If you have ever played a game where you push little plastic/virtual pieces around, roll dice, conquer the lands of your enemy, & produce new pieces to conquer with, you will be able to jump right into TripleA!

An open-source game engine that is being developed in Java. Currently in the very earliest stages of production, where I am still creating all of the baseline utilities for loading and using graphics.