Ct.js is a desktop game engine that makes learning programming fun
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
A fresh & lightweight javascript game engine
The flexible game engine
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
The Tiny JavaScript Game Engine That Can!
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
Web powered cross-platform 3D, WebXR game engine
Multi-platform game engine similar to old Megaman with a stage editor
A Simple Game Engine
cross-platform 2d game engine