Powerful, mature open-source cross-platform game engine for Python
Multi Theft Auto is a game engine
Flax Engine, multi-platform 3D game engine
Solar2D Game Engine main repository (ex Corona SDK)
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Descent 3 by Outrage Entertainment
dhewm 3 main repository
Free game engine for development of desktop, mobile, and web games
Recreation of the classic Grand Theft Auto III game executable
3D Game engine with editor
3D Procedural Game Engine Using OpenGL
Multi-platform 2D and 3D game engine
Orx: Data-Driven Game Engine
Modified source engine (2017) developed by valve and leaked in 2020
Urho3D Game engine
Mini game engine for games104
Opensource crossplatform Fallout 2 game engine writen in C++ and SDL
A fork of dhewm3 with an emphasis on modernisation and vanilla Doom 3
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
3D C++ Game Engine - yet another open source game engine
Improved version of the X-Ray Engine, the game engine
A 2D game engine and level editor
KlayGE is a cross-platform open source game engine
A cross-platform 2D game engine
Game engine for playing tomb raider 1 - 5 levels.