The flexible game engine
Godot is a powerful cross-platform game engine
Solar2D Game Engine main repository (ex Corona SDK)
JavaScript-based game engine designed to empower developers
Flax Engine, multi-platform 3D game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Cocos simplifies game creation and distribution with Cocos Creator
Play Fighting Fantasy fan stories on this simple engine
Multi-platform 2D and 3D game engine
V1, Mirror Classic. V2, Mirror Engine: Join Discord for access
Cross-platform 2D and 3D game engine with modular architecture
A game engine with an emphasis on real-time cutting-edge solutions
Cross-Platform C++ 2D/3D game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Xash3D FWGS engine
An OpenGL RTS game engine written in C
Simple and light-weight 3D game engine
Zig game engine & graphics toolkit
A complete 3-D game development suite written in Java
Open source voxel game engine with support for survival and crafting
Game engine supporting many 3D/2D formats and graphic effects
Unreal Engine Archives Explorer
A game engine powered by python and panda3d
LayaAir is an open-source 2D/3D engine
N64 Game-Engine and Editor using libdragon & tiny3d