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.
Godot is a powerful cross-platform game engine
A simple and easy-to-use library to enjoy videogames programming
Enables Roblox developers to use professional software tools
Real Time Strategy game engine supporting early Westwood classics
Desktop/Android/HTML5/iOS Java game development framework
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
A real-time game development platform
Open source HTML5 game framework that offers WebGL and Canvas
Fast and lightweight JavaScript game engine built on WebGL and glTF
lua dev plugin for unreal engine 4 or 5
An API for interacting with Starcraft: Brood War (1.16.1)
All-In-One program that combines multiple Fortnite Dev Account tools.
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
CTFs as you need them
You can make it - Open Source MMORPG Platform
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
Open Source MMORPG Framework
ThinkPHP Framework
A game framework written with osu! in mind.
This pack add's custom object and rides into your "RCT3 Platinum" game
Free and Open Game Programming Language for Windows and GNU/Linux
Game engine supporting many 3D/2D formats and graphic effects