Ct.js is a desktop game engine that makes learning programming fun
Open game and rendering engine packed into a JavaScript framework
Free game engine for development of desktop, mobile, and web games
Magic Another Game Engine
3D Game engine with editor
Stride (formerly Xenko), a free and open-source cross-platform C# game
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
3D game engine with lua scripting
A fresh & lightweight javascript game engine
The flexible game engine
The Tiny JavaScript Game Engine That Can!
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
An OpenGL RTS game engine written in C
Descent 3 by Outrage Entertainment
Game engine supporting many 3D/2D formats and graphic effects
Haskell game engine library for roguelike dungeon crawlers
A cross-platform, open-source, pure C game engine for mobile game
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
3D C++ Game Engine - yet another open source game engine
A 2D game engine and level editor
Web powered cross-platform 3D, WebXR game engine
Multi-platform game engine similar to old Megaman with a stage editor
A roguelike game engine/editor
Component 2D Game Engine
3D Game engine