Godot is a powerful cross-platform game engine
Multi Theft Auto is a game engine
Xash3D FWGS engine
The Ren'Py Visual Novel Engine
Voxel game-creation platform with easy modding and game creation
The game engine for everyone
A game engine powered by python and panda3d
The flexible game engine
Open source voxel game engine with support for survival and crafting
dhewm 3 main repository
Real Time Strategy game engine supporting early Westwood classics
The HTML5 Creation Engine
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Powerful, mature open-source cross-platform game engine for Python
A refreshingly simple data-driven game engine built in Rust
Solar2D Game Engine main repository (ex Corona SDK)
Cocos simplifies game creation and distribution with Cocos Creator
Cross-Platform C++ 2D/3D game engine
A complete 3-D game development suite written in Java
The ioquake3 community effort to continue supporting/developing id's
Open-source engine for Heroes of Might and Magic III
Recreation of the classic Grand Theft Auto III game executable
Fast and lightweight JavaScript game engine built on WebGL and glTF
Voxel game engine in C++ with OpenGL
An OpenGL RTS game engine written in C