Godot is a powerful cross-platform game engine
Xash3D FWGS engine
The game engine for everyone
The Ren'Py Visual Novel Engine
Open source voxel game engine with support for survival and crafting
Open-source engine for Heroes of Might and Magic III
A complete 3-D game development suite written in Java
Multi Theft Auto is a game engine
Real Time Strategy game engine supporting early Westwood classics
A game engine powered by python and panda3d
Solar2D Game Engine main repository (ex Corona SDK)
Voxel game-creation platform with easy modding and game creation
The flexible game engine
Magic Another Game Engine
Voxel game engine in C++ with OpenGL
Fast and lightweight JavaScript game engine built on WebGL and glTF
dhewm 3 main repository
Cross-platform 2D and 3D game engine with modular architecture
A retro game engine for Python
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
The HTML5 Creation Engine
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Cross-Platform C++ 2D/3D game engine
Open source clone of the Age of Empires II engine
A refreshingly simple data-driven game engine built in Rust