Godot is a powerful cross-platform game engine
Xash3D FWGS engine
Injectable LUA scripting system, SDK generator, live property editor
Open source voxel game engine with support for survival and crafting
A game engine powered by python and panda3d
Multi Theft Auto is a game engine
A complete 3-D game development suite written in Java
Solar2D Game Engine main repository (ex Corona SDK)
Voxel game-creation platform with easy modding and game creation
Fast and lightweight JavaScript game engine built on WebGL and glTF
The HTML5 Creation Engine
The Ren'Py Visual Novel Engine
The game engine for everyone
Open-source engine for Heroes of Might and Magic III
Real Time Strategy game engine supporting early Westwood classics
fheroes2 is a recreation of Heroes of Might and Magic II game engine
The ioquake3 community effort to continue supporting/developing id's
Powerful, mature open-source cross-platform game engine for Python
A retro game engine for Python
Magic Another Game Engine
Open source clone of the Age of Empires II engine
Recreation of the classic Grand Theft Auto III game executable
dhewm 3 main repository
An easy to use 2D HTML5 game engine written in TypeScript
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D