A game engine powered by python and panda3d
Stride (formerly Xenko), a free and open-source cross-platform C# game
Ct.js is a desktop game engine that makes learning programming fun
Free game engine for development of desktop, mobile, and web games
Multi Theft Auto is a game engine
A Flutter based game engine
Open game and rendering engine packed into a JavaScript framework
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
2D JavaScript Physics Engine
3D Procedural Game Engine Using OpenGL
Orx: Portable Game Engine
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Modified source engine (2017) developed by valve and leaked in 2020
The multiplayer game engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
A cross-platform, open-source, pure C game engine for mobile game
a UCI chess engine
Go 3D Game Engine
3D C++ Game Engine - yet another open source game engine
KlayGE is a cross-platform open source game engine
Planimeter Game Engine 2D - LÖVE-based game engine for Lua
Web powered cross-platform 3D, WebXR game engine
online 4X browser game engine
Multi-platform game engine similar to old Megaman with a stage editor