JavaScript-based game engine designed to empower developers
GemRB is a portable open-source implementation of the Infinity Engine
A game engine with an emphasis on real-time cutting-edge solutions
Zig game engine & graphics toolkit
Game engine supporting many 3D/2D formats and graphic effects
Orx: Portable Game Engine
A game engine powered by python and panda3d
Phaser is a free and fast 2D game framework for making HTML5 games
Descent 3 by Outrage Entertainment
s&box is a modern game engine, built on Valve's Source 2
YimMenu, a GTA V menu protecting against a wide ranges
MCP server for interfacing with Godot game engine
Sunfish: a Python Chess Engine in 111 lines of code
A re-implementation of Freelancer
A 2D rigid body physics engine for the web
Godot game template and component-based framework
3D game engine/framework in C, with Luajit and Python bindings now
IsoCity: City building simulation game
Fully async, multithreaded, predictive, open source, 3.01 reach
An Open Source package that allows video game creators
UI Automation Framework for Games and Apps
lua dev plugin for unreal engine 4 or 5
Easy to use Python library for creating 2D arcade games
Creative cellular automata browser game
Behavior tree AI for Godot Engine