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
A real-time game development platform
Enables Roblox developers to use professional software tools
Open game and rendering engine packed into a JavaScript framework
Desktop/Android/HTML5/iOS Java game development framework
Real Time Strategy game engine supporting early Westwood classics
One framework for creating powerful cross-platform games
Open source HTML5 game framework that offers WebGL and Canvas
Fast and lightweight JavaScript game engine built on WebGL and glTF
All-In-One program that combines multiple Fortnite Dev Account tools.
Open Source MMORPG Framework
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
Arianne is an engine to develop multiplayer online games like Stendhal
An API for interacting with Starcraft: Brood War (1.16.1)
lua dev plugin for unreal engine 4 or 5
Updated emulator of Forgotten Realms: Unlimited Adventures
This pack add's custom object and rides into your "RCT3 Platinum" game
TX Library is a tiny graphics library for Win32 written in C++.
CTFs as you need them