A Flutter based game engine
Free game engine for development of desktop, mobile, and web games
Cross-platform 2D and 3D game engine with modular architecture
A modular Common Lisp game engine
Eva.js is a front-end game engine for creating interactive projects
A refreshingly simple data-driven game engine built in Rust
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Stride (formerly Xenko), a free and open-source cross-platform C# game
Svelto ECS C# Entity Component System
A game engine with an emphasis on real-time cutting-edge solutions
Rust library to create a Good Game Easily
The multiplayer game engine
Murder is a pixel art ECS game engine
Entitas is a super fast Entity Component System (ECS) Framework
Engo is an open-source 2D game engine written in Go
Vivid is a modern C++ 3D engine using OpenGL4+
3D C++ Game Engine - yet another open source game engine
Amazon Lumberyard is a free AAA game engine
Data-oriented and data-driven game engine written in Rust
JavaScript Game Engine
Modern AS3 Game Engine
A free ActionScript 3 library designed for developing 2D Flash games
A lightweight HTML5 Game Engine