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
A retro game engine for Python
Multi Theft Auto is a game engine
The ioquake3 community effort to continue supporting/developing id's
A game engine powered by python and panda3d
Voxel game-creation platform with easy modding and game creation
The game engine for everyone
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Solar2D Game Engine main repository (ex Corona SDK)
Real Time Strategy game engine supporting early Westwood classics
LayaAir is an open-source 2D/3D engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
A complete 3-D game development suite written in Java
Free game engine for development of desktop, mobile, and web games
Multi-platform 2D and 3D game engine
Magic Another Game Engine
Stride (formerly Xenko), a free and open-source cross-platform C# game
Open source voxel game engine with support for survival and crafting
A quick and easy to use drag and drop retro game creator
Xash3D FWGS engine
dhewm 3 main repository
A refreshingly simple data-driven game engine built in Rust
The Tiny JavaScript Game Engine That Can!