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
A real-time game development platform
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
Open game and rendering engine packed into a JavaScript framework
Real Time Strategy game engine supporting early Westwood classics
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open Source MMORPG Framework
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 HTML5 game framework that offers WebGL and Canvas
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)
Updated emulator of Forgotten Realms: Unlimited Adventures
lua dev plugin for unreal engine 4 or 5
This pack add's custom object and rides into your "RCT3 Platinum" game
Generate ready-to-use disc images for your Sega Dreamcast system !
Unity3D Client And C# Server Framework
ThinkPHP Framework