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
A real-time game development platform
Desktop/Android/HTML5/iOS Java game development framework
A simple and easy-to-use library to enjoy videogames programming
Godot is a powerful cross-platform game engine
Open game and rendering engine packed into a JavaScript framework
One framework for creating powerful cross-platform games
Arianne is an engine to develop multiplayer online games like Stendhal
Real Time Strategy game engine supporting early Westwood classics
Fast and lightweight JavaScript game engine built on WebGL and glTF
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Open source HTML5 game framework that offers WebGL and Canvas
The game engine for everyone
This pack add's custom object and rides into your "RCT3 Platinum" game
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
INSTEAD - Simple Text Adventure Interpreter.
TX Library is a tiny graphics library for Win32 written in C++.
Updated emulator of Forgotten Realms: Unlimited Adventures
Generate ready-to-use disc images for your Sega Dreamcast system !
Open Source MMORPG Framework