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
Real Time Strategy game engine supporting early Westwood classics
Fast and lightweight JavaScript game engine built on WebGL and glTF
Arianne is an engine to develop multiplayer online games like Stendhal
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
All-In-One program that combines multiple Fortnite Dev Account tools.
An API for interacting with Starcraft: Brood War (1.16.1)
Open source HTML5 game framework that offers WebGL and Canvas
Open source library for N64 development
Single-/multi-player card game Mau Mau (similar to UNO®)
Open Source MMORPG Framework
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
This pack add's custom object and rides into your "RCT3 Platinum" game
Updated emulator of Forgotten Realms: Unlimited Adventures