2d/3d Game Engine
Paintown is a 2d fighting game engine.
An advanced flexible game engine for Java.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
A Lua Game Engine
A runtime-programmable, cross platform, game engine
2D physics engine for games
A generic 2D engine for any kind of game
A 2D Adventure Game & Engine
C++ 3D Game Engine
C++ OpenSource Game Fabric based on SDL2
TurboSphere is an easy to learn and powerful JS based game engine.
A 3D, fully concurrent game engine
C++ Text Adventure Engine
A retro style video game engine for RPGs and adventure games.
2D Game Engine, based on OpenGL and focused on Isometric Games