The game engine for everyone
Flax Engine, multi-platform 3D game engine
Powerful, mature open-source cross-platform game engine for Python
Multi-platform 2D and 3D game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A free 3D game engine to create games and realtimes scenes for Windows
Modified source engine (2017) developed by valve and leaked in 2020
Mini game engine for games104
A high speed C++17 Vulkan game engine
2D Game Engine
A 2D game engine and level editor
KlayGE is a cross-platform open source game engine
A fast, scalable, distributed game server engine/framework for C++
Open-source, cross-platform, C++ game engine for creating 2D/3D games
A runtime-programmable, cross platform, game engine
A generic 2D engine for any kind of game
A retro style video game engine for RPGs and adventure games.
A cross platform 3d c++ game engine
A DirectX 9 C++ game engine