JavaScript-based game engine designed to empower developers
GemRB is a portable open-source implementation of the Infinity Engine
A dead simple 2D game engine for Go
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
RetroArch is a frontend for emulators, game engines and media players.
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
Real Time Strategy game engine supporting early Westwood classics
YimMenu, a GTA V menu protecting against a wide ranges
Action RPG that's easy to mod
MCP server for interfacing with Godot game engine
3D Engine c++
A re-implementation of Freelancer
Sunfish: a Python Chess Engine in 111 lines of code
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
Fully async, multithreaded, predictive, open source, 3.01 reach
IsoCity: City building simulation game
An Open Source package that allows video game creators