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
Open game and rendering engine packed into a JavaScript framework
Desktop/Android/HTML5/iOS Java game development framework
Fast and lightweight JavaScript game engine built on WebGL and glTF
One framework for creating powerful cross-platform games
Real Time Strategy game engine supporting early Westwood classics
Open source HTML5 game framework that offers WebGL and Canvas
Open source library for creative expression on the web, desktop, etc.
Open Source MMORPG Framework
Gideros Release version
Self-hosted CMS platform based on the Laravel PHP Framework
ThinkPHP Framework
CTFs as you need them
You can make it - Open Source MMORPG Platform
lua dev plugin for unreal engine 4 or 5
A game framework written with osu! in mind.
Arianne is an engine to develop multiplayer online games like Stendhal
TX Library is a tiny graphics library for Win32 written in C++.
Game engine supporting many 3D/2D formats and graphic effects
An isometric arcade-style game of skill, puzzles and exploration
INSTEAD - Simple Text Adventure Interpreter.
SDL based generic 2D game engine
OgreWin3D