Free game engine for development of desktop, mobile, and web games
Open game and rendering engine packed into a JavaScript framework
Ct.js is a desktop game engine that makes learning programming fun
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
3D Game engine with editor
3D and 2D game engine written in Rust
The Tiny JavaScript Game Engine That Can!
Cocos simplifies game creation and distribution with Cocos Creator
Stride (formerly Xenko), a free and open-source cross-platform C# game
The flexible game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
The ioquake3 community effort to continue supporting/developing id's
Free, cross-platform 2D game engine powered by Haxe and OpenFL
2D JavaScript Physics Engine
Descent 3 by Outrage Entertainment
Cross-platform game engine in Rust
Free, open source game engine online
Game engine supporting many 3D/2D formats and graphic effects
The multiplayer game engine
MIT Licensed Open Source version of Torque3D from GarageGames
A cross-platform, open-source, pure C game engine for mobile game
Engo is an open-source 2D game engine written in Go
Cross-platform 3D scene editor based on three.js, golang and mongodb
3D C++ Game Engine - yet another open source game engine
2D Game Engine