The flexible game engine
Godot is a powerful cross-platform game engine
Solar2D Game Engine main repository (ex Corona SDK)
Fast and lightweight JavaScript game engine built on WebGL and glTF
Flax Engine, multi-platform 3D game engine
Multi-platform 2D and 3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
Cross-Platform C++ 2D/3D game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cross-platform 2D and 3D game engine with modular architecture
Xash3D FWGS engine
A game engine with an emphasis on real-time cutting-edge solutions
An OpenGL RTS game engine written in C
Simple and light-weight 3D game engine
Zig game engine & graphics toolkit
Open source voxel game engine with support for survival and crafting
A complete 3-D game development suite written in Java
Unreal Engine Archives Explorer
A game engine powered by python and panda3d
Improve your Baduk skills by training with KataGo
Multi Theft Auto is a game engine
Game engine supporting many 3D/2D formats and graphic effects
N64 Game-Engine and Editor using libdragon & tiny3d
Recreation of the classic Grand Theft Auto III game executable
Phaser is a free and fast 2D game framework for making HTML5 games