Browse free open source Game Development Frameworks and projects for Windows below. Use the toggles on the left to filter open source Game Development Frameworks by OS, license, language, programming language, and project status.
A development environment focused on modding
Desktop/Android/HTML5/iOS Java game development framework
A real-time game development platform
One framework for creating powerful cross-platform games
Godot is a powerful cross-platform game engine
A simple and easy-to-use library to enjoy videogames programming
Open source HTML5 game framework that offers WebGL and Canvas
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open game and rendering engine packed into a JavaScript framework
Arianne is an engine to develop multiplayer online games like Stendhal
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
This pack add's custom object and rides into your "RCT3 Platinum" game
Real Time Strategy game engine supporting early Westwood classics
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
TX Library is a tiny graphics library for Win32 written in C++.
INSTEAD - Simple Text Adventure Interpreter.
ThinkPHP Framework
Updated emulator of Forgotten Realms: Unlimited Adventures
CTFs as you need them
The game engine for everyone