The game engine for everyone
Voxel game engine in C++ with OpenGL
dhewm 3 main repository
Cross-platform 2D and 3D game engine with modular architecture
Open source clone of the Age of Empires II engine
3D Game engine with editor
Free game engine for development of desktop, mobile, and web games
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
GemRB is a portable open-source implementation of the Infinity Engine
Injectable LUA scripting system, SDK generator, live property editor
An isometric arcade-style game of skill, puzzles and exploration
Urho3D Game engine
Vivid is a modern C++ 3D engine using OpenGL4+
DOOM / Heretic / Hexen source port with enhanced graphics and UI
Amazon Lumberyard is a free AAA game engine
3D C++ Game Engine - yet another open source game engine
2D Game Engine
2D Game Engine with Lua Scripting made on top of SFML