Godot is a powerful cross-platform game engine
Enables Roblox developers to use professional software tools
Real Time Strategy game engine supporting early Westwood classics
One framework for creating powerful cross-platform games
A simple and easy-to-use library to enjoy videogames programming
Desktop/Android/HTML5/iOS Java game development framework
Open source HTML5 game framework that offers WebGL and Canvas
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open game and rendering engine packed into a JavaScript framework
Open Source MMORPG Framework
A game framework written with osu! in mind.
Gideros Release version
Unity3D Client And C# Server Framework
lua dev plugin for unreal engine 4 or 5
Self-hosted CMS platform based on the Laravel PHP Framework
You can make it - Open Source MMORPG Platform
Open source library for creative expression on the web, desktop, etc.
CTFs as you need them
ThinkPHP Framework
All-In-One program that combines multiple Fortnite Dev Account tools.
Arianne is an engine to develop multiplayer online games like Stendhal
Ze Text Adventure game Builder : Create as you play !
INSTEAD - Simple Text Adventure Interpreter.
Old-school 2D game engine
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented