The flexible game engine
Solar2D Game Engine main repository (ex Corona SDK)
Godot is a powerful cross-platform game engine
Game engine to build text adventures.
Fast and lightweight JavaScript game engine built on WebGL and glTF
An unofficial rules engine for the world's greatest card game
Cross-platform 2D and 3D game engine with modular architecture
Cocos simplifies game creation and distribution with Cocos Creator
Flax Engine, multi-platform 3D game engine
The Echo Engine is a simple game engine for text adventure games
Multi-platform 2D and 3D game engine
Cross-Platform C++ 2D/3D game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Amazing Adventure-Cheat Engine
JavaScript-based game engine designed to empower developers
V1, Mirror Classic. V2, Mirror Engine: Join Discord for access
A game engine with an emphasis on real-time cutting-edge solutions
An OpenGL RTS game engine written in C
Xash3D FWGS engine
Zig game engine & graphics toolkit
Simple and light-weight 3D 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