Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cross-Platform C++ 2D/3D game engine
Voxel game-creation platform with easy modding and game creation
Free game engine for development of desktop, mobile, and web games
3D Game engine with editor
3D game engine with lua scripting
RTSish Game Engine
An isometric arcade-style game of skill, puzzles and exploration
Injectable LUA scripting system, SDK generator, live property editor
A free 3D game engine to create games and realtimes scenes for Windows
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
3D C++ Game Engine - yet another open source game engine
2D Game Engine
2D Game Engine with Lua Scripting made on top of SFML
A cross platform Lua based game engine
Cross-platform 2D and 3D game engine
A fast, scalable, distributed game server engine/framework for C++
Game engine for playing tomb raider 1 - 5 levels.
A Simple Game Engine
A retro style video game engine for RPGs and adventure games.