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
Arianne is an engine to develop multiplayer online games like Stendhal
Open game and rendering engine packed into a JavaScript framework
Real Time Strategy game engine supporting early Westwood classics
Desktop/Android/HTML5/iOS Java game development framework
Fast and lightweight JavaScript game engine built on WebGL and glTF
A real-time game development platform
One framework for creating powerful cross-platform games
A game framework written with osu! in mind.
Open Source MMORPG Framework
Open source HTML5 game framework that offers WebGL and Canvas
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.
Open source library for N64 development
ThinkPHP Framework
This pack add's custom object and rides into your "RCT3 Platinum" game
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
Orx: Data-Driven Game Engine
Self-hosted CMS platform based on the Laravel PHP Framework
INSTEAD - Simple Text Adventure Interpreter.
CTFs as you need them