Solar2D Game Engine main repository (ex Corona SDK)
Godot is a powerful cross-platform game engine
The flexible game engine
An OpenGL RTS game engine written in C
Fast and lightweight JavaScript game engine built on WebGL and glTF
A game engine powered by python and panda3d
Flax Engine, multi-platform 3D game engine
Cross-platform 2D and 3D game engine with modular architecture
Multi-platform 2D and 3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
A game engine with an emphasis on real-time cutting-edge solutions
Cross-Platform C++ 2D/3D game engine
Xash3D FWGS engine
Powerful, mature open-source cross-platform game engine for Python
Zig game engine & graphics toolkit
Injectable LUA scripting system, SDK generator, live property editor
The Ren'Py Visual Novel Engine
A retro game engine for Python
A complete 3-D game development suite written in Java
GemRB is a portable open-source implementation of the Infinity Engine
Open source voxel game engine with support for survival and crafting
Open source clone of the Age of Empires II engine
Game engine supporting many 3D/2D formats and graphic effects
Pycraft is an open-source, OpenGL based game made in Python