Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Godot is a powerful cross-platform game engine
The Ren'Py Visual Novel Engine
Multi Theft Auto is a game engine
The game engine for everyone
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Open-source engine for Heroes of Might and Magic III
Open game and rendering engine packed into a JavaScript framework
A complete 3-D game development suite written in Java
Open source voxel game engine with support for survival and crafting
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)
Xash3D FWGS engine
dhewm 3 main repository
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Fast and lightweight JavaScript game engine built on WebGL and glTF
Recreation of the classic Grand Theft Auto III game executable
LayaAir is an open-source 2D/3D engine
Cocos simplifies game creation and distribution with Cocos Creator
Voxel game-creation platform with easy modding and game creation
Powerful, mature open-source cross-platform game engine for Python
The ioquake3 community effort to continue supporting/developing id's
A multi core friendly rigid body physics and collision detection lib
A refreshingly simple data-driven game engine built in Rust