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
A real-time game development platform
This pack add's custom object and rides into your "RCT3 Platinum" game
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
Real Time Strategy game engine supporting early Westwood classics
Arianne is an engine to develop multiplayer online games like Stendhal
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.
An API for interacting with Starcraft: Brood War (1.16.1)
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open source HTML5 game framework that offers WebGL and Canvas
Open Source MMORPG Framework
lua dev plugin for unreal engine 4 or 5
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Open source library for N64 development
Open source library for creative expression on the web, desktop, etc.
A game framework written with osu! in mind.
Updated emulator of Forgotten Realms: Unlimited Adventures
FreeCS is a free-software reimplementation of Counter-Strike 1.5.