Open-source engine for Heroes of Might and Magic III
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
fheroes2 is a recreation of Heroes of Might and Magic II game engine
A game framework written with osu! in mind.
Godot is a powerful cross-platform game engine
Multi Theft Auto is a game engine
Solar2D Game Engine main repository (ex Corona SDK)
Cross-platform 2D game engine focused on ultimate productivity
A completely free, open-source, 2D game engine
The Ren'Py Visual Novel Engine
RPG Maker 2000/2003 and EasyRPG games interpreter
A high-performance, industry-standard 2D physics engine built on Box2D
3D Procedural Game Engine Using OpenGL
Open game and rendering engine packed into a JavaScript framework
A fresh & lightweight javascript game engine
Open source clone of the Age of Empires II engine
The game engine for everyone
Descent 3 by Outrage Entertainment
Recreation of the classic Grand Theft Auto III game executable
A game engine powered by python and panda3d
A game engine with an emphasis on real-time cutting-edge solutions
New Godot bindings for Swift
Open source voxel game engine with support for survival and crafting
A complete 3-D game development suite written in Java
A multi core friendly rigid body physics and collision detection lib