Godot is a powerful cross-platform game engine
Open source voxel game engine with support for survival and crafting
Xash3D FWGS engine
The Ren'Py Visual Novel Engine
A complete 3-D game development suite written in Java
Open-source engine for Heroes of Might and Magic III
Powerful, mature open-source cross-platform game engine for Python
A game engine powered by python and panda3d
The game engine for everyone
Real Time Strategy game engine supporting early Westwood classics
Multi Theft Auto is a game engine
Solar2D Game Engine main repository (ex Corona SDK)
Cross-Platform C++ 2D/3D game engine
JavaScript-based game engine designed to empower developers
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
The ioquake3 community effort to continue supporting/developing id's
dhewm 3 main repository
Voxel game-creation platform with easy modding and game creation
Voxel game engine in C++ with OpenGL
Free game engine for development of desktop, mobile, and web games
Descent 3 by Outrage Entertainment
Open source clone of the Age of Empires II engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A refreshingly simple data-driven game engine built in Rust