Urho3D Game engine
A cross-platform, open-source, pure C game engine for mobile game
Engo is an open-source 2D game engine written in Go
Open source reimplementation of GTA San Andreas game engine in Unity
Open source reimplementation of GTA San Andreas game engine in Unity
2D Game Engine
Cross-platform 2D and 3D game engine
A cross-platform 2D game engine
Free and Open Game Programming Language for Windows and GNU/Linux
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
Blueshift is a cross-platform 3D game engine implemented in C++
Portable game engine with main focus on point-and-click adventures
online 4X browser game engine
The Atomic Game Engine is a multi-platform 2D and 3D engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Paintown is a 2d fighting game engine.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Educational framework for OpenGLES, OpenCL and OpenAL
2D physics engine for games
Visual Novel engine, editor and game development.
Free Android 2D OpenGL Game Engine
cross-platform 2d game engine
Cross Engine is game engine for Windows, Mac, Linux and Android