The flexible game engine
Godot is a powerful cross-platform game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Solar2D Game Engine main repository (ex Corona SDK)
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cross-platform 2D and 3D game engine with modular architecture
05k0nz's legacy is safe
A game engine with an emphasis on real-time cutting-edge solutions
Multi-platform 2D and 3D game engine
Game engine supporting many 3D/2D formats and graphic effects
An OpenGL RTS game engine written in C
Zig game engine & graphics toolkit
Xash3D FWGS engine
Voxel game-creation platform with easy modding and game creation
One of the best Prodigy hacks
A complete 3-D game development suite written in Java
Open source voxel game engine with support for survival and crafting
A high-performance, industry-standard 2D physics engine built on Box2D
A retro game engine for Python
HTML5 Canvas Tower Building Game
Self-hosted game stream host for Moonlight
Multi Theft Auto is a game engine
A game engine powered by python and panda3d
LayaAir is an open-source 2D/3D engine