A Game Similar to Mastermind
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Simple java football game
Go 3D Game Engine
3D C++ Game Engine - yet another open source game engine
Modern 3D engine and IDE written using C# and C++.
Data-oriented and data-driven game engine written in Rust
8-bit Graphical API for Java
Clojure in Unity
Source code of the chapters of the book 3D Game Development with LWJGL
CSG for jMonkey
Example code for creating a 2D platform game in Java.
Easy fine console input/output for java
Play Tute playing card game
A platform for Artificial Intelligence experimentation on Minecraft
Web powered cross-platform 3D, WebXR game engine
A Java light, open source first person shooter,with editors.
A fantasy RPG.
A mobile game distributed server implemented using netty4.X
The Atomic Game Engine is a multi-platform 2D and 3D engine
Massive Multiplayer Online Wargame Leveraging the Internet
Realtime 3D engine for game development