Multi Theft Auto is a game engine
Open source clone of the Age of Empires II engine
Powerful, mature open-source cross-platform game engine for Python
The Tiny JavaScript Game Engine That Can!
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Python MUD/MUX/MUSH/MU* development system
Go bindings for raylib, a simple and easy-to-use library
Embeddable unity game engine view for Flutter
Murder is a pixel art ECS game engine
A simple tool to allow Chessmaster 10/11 bot customizations
Data-oriented and data-driven game engine written in Rust
Web powered cross-platform 3D, WebXR game engine
Starter project to get a Phaser game environment up and running
Multi-threaded game engine for Android
A runtime-programmable, cross platform, game engine
XNA based game engine completely written in c#
Egret is a brand new open mobile game and application engine
A retro style video game engine for RPGs and adventure games.
A lightweight HTML5 Game Engine