The flexible game engine
Solar2D Game Engine main repository (ex Corona SDK)
Flax Engine, multi-platform 3D game engine
Godot is a powerful cross-platform game engine
Cross-Platform C++ 2D/3D game engine
Cross-platform 2D and 3D game engine with modular architecture
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
JavaScript-based game engine designed to empower developers
Fast and lightweight JavaScript game engine built on WebGL and glTF
A game engine with an emphasis on real-time cutting-edge solutions
An OpenGL RTS game engine written in C
Xash3D FWGS engine
Simple and light-weight 3D game engine
V1, Mirror Classic. V2, Mirror Engine: Join Discord for access
Unreal Engine Archives Explorer
Zig game engine & graphics toolkit
N64 Game-Engine and Editor using libdragon & tiny3d
3D engine with modern graphics
Multi Theft Auto is a game engine
The "Third Way" for Home Assistant Automations
A complete 3-D game development suite written in Java
Powerful, mature open-source cross-platform game engine for Python
C++ parallel computing and asynchronous networking engine