Godot is a powerful cross-platform game engine
Set of Python modules designed for writing video games
The game engine for everyone
The Ren'Py Visual Novel Engine
An updated version of the classic "Basic Computer Games" book
Noob-proof (N)3DS Custom Firmware
A simple and easy-to-use library to enjoy videogames programming
Multi Theft Auto is a game engine
Fast, user-friendly cross-platform custom launcher for Minecraft
Create Minecraft bots with a powerful and high level JavaScript API
Simple GTK# Paint Program
Python MUD/MUX/MUSH/MU* development system
A refreshingly simple data-driven game engine built in Rust
Open source clone of the Age of Empires II engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A sharp, readable, vector-y version of Monocraft
Just another ComputerCraft fork
Free, open source game engine online
LayaAir is an open-source 2D/3D engine
Doom-based AI research platform for reinforcement learning
Go bindings for raylib, a simple and easy-to-use library
lua dev plugin for unreal engine 4 or 5
A dead simple 2D game engine for Go
Kotlin extensions for the libGDX game framework
Open source library for creative expression on the web, desktop, etc.