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
Enables Roblox developers to use professional software tools
A simple and easy-to-use library to enjoy videogames programming
Open game and rendering engine packed into a JavaScript framework
A real-time game development platform
Fast and lightweight JavaScript game engine built on WebGL and glTF
Real Time Strategy game engine supporting early Westwood classics
Desktop/Android/HTML5/iOS Java game development framework
Arianne is an engine to develop multiplayer online games like Stendhal
One framework for creating powerful cross-platform games
Open source library for N64 development
All-In-One program that combines multiple Fortnite Dev Account tools.
Open Source MMORPG Framework
Open source HTML5 game framework that offers WebGL and Canvas
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
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
An API for interacting with Starcraft: Brood War (1.16.1)
TX Library is a tiny graphics library for Win32 written in C++.
A game framework written with osu! in mind.
Updated emulator of Forgotten Realms: Unlimited Adventures
Open-source, cross-platform, C++ game engine for creating 2D/3D games