The flexible game engine
Godot is a powerful cross-platform game engine
Solar2D Game Engine main repository (ex Corona SDK)
Cocos simplifies game creation and distribution with Cocos Creator
Fast and lightweight JavaScript game engine built on WebGL and glTF
Cross-platform 2D and 3D game engine with modular architecture
Multi-platform 2D and 3D game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cross-Platform C++ 2D/3D game engine
A game engine with an emphasis on real-time cutting-edge solutions
An OpenGL RTS game engine written in C
Zig game engine & graphics toolkit
Xash3D FWGS engine
Game engine supporting many 3D/2D formats and graphic effects
Open source voxel game engine with support for survival and crafting
A complete 3-D game development suite written in Java
Multi Theft Auto is a game engine
A game engine powered by python and panda3d
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
This is a re-implementation of the 1995 PSX game wipEout
LayaAir is an open-source 2D/3D engine
A modular Common Lisp game engine
A Minecraft mod designed to improve frame rates
Recreation of the classic Grand Theft Auto III game executable
Descent 3 by Outrage Entertainment