3D Engine with Blender Integration
The flexible game engine
Solar2D Game Engine main repository (ex Corona SDK)
Godot is a powerful cross-platform game engine
Free and open source 3D creation software
Fast and lightweight JavaScript game engine built on WebGL and glTF
Flax Engine, multi-platform 3D game engine
Cross-platform 2D and 3D game engine with modular architecture
Cocos simplifies game creation and distribution with Cocos Creator
Cross-Platform C++ 2D/3D game engine
Multi-platform 2D and 3D game engine
V1, Mirror Classic. V2, Mirror Engine: Join Discord for access
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
JavaScript-based game engine designed to empower developers
A game engine with an emphasis on real-time cutting-edge solutions
An OpenGL RTS game engine written in C
Xash3D FWGS engine
Open source clone of the Age of Empires II engine
Zig game engine & graphics toolkit
Simple and light-weight 3D game engine
Here we're trying to create the easiest open-source game engine.
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