LittleJS is a fast, lightweight, and fully open source HTML5 game engine designed for simplicity and performance. Its small footprint is packed with a comprehensive feature set including 2D and 3D rendering, physics, particles, sound, and input handling. The code is very clean and well documented with many examples to get you started quickly.

Crown is a complete and cross-platform game engine designed for flexibility, performance, and fast-iterations.

Pixi’VN is a versatile and powerful visual novel/2D game engine. It is based on JavaScript/TypeScript and uses the PixiJS library for rendering.

Blazium Engine is a free, open-source fork of Godot for building cross-platform 2D and 3D games and applications, with the tools, platform integrations, and improvements you need.

ECS based game engine originally created for space station 14 but other games are supported. It is intended for multiplayer games and it is possible to sandbox the client.

Gideros is a cross-platform development environment for creating games and interactive applications in 2D or 3D. It is easy to pick up, quick to develop and robust to deploy.

Butano is a modern C++ high level engine for the Game Boy Advance.

An open source HTML5 game engine that empowers developers and designers to focus on content

RouteVN Creator is a free, open-source tool that lets anyone, writers, artists, hobbyists to create their own Visual Novels. No coding or technical background required.

s&box is a spiritual successor to Garry’s Mod, using Source 2 to create a modern, intuitive, moddable game development environment.

A visual programming language inspired by Scratch.

Usagi is a 2D game engine for making pixel art games in Lua 5.5. It features live reload, single-command cross-platform export, and a pause menu with input remapping built in.

A free and open-source 2D and 3D cross-platform game engine that can be used to create video games for PC, mobile devices and virtual reality or interactive content.

A free game engine written in TypeScript for making 2D games in HTML5 canvas, whether you're new to game development or you're an experienced game developer.

Gondwana is a cross-platform 2.5D game and rendering engine written in C#/.NET 8, built with SkiaSharp for graphics. It modernizes legacy Win32/GDI patterns into a modular, high-performance framework that runs on desktop, mobile, and web.

Cross-platform 2D and 3D game engine with modular architecture

Fast and lightweight 2D JavaScript library that allows everyone to enjoy the power of hardware acceleration without prior knowledge of WebGL

A refreshingly simple data-driven game engine built in Rust

Kaiju is a game development platform where all game scripting and logic is written in Go, combining the performance of a compiled language with the simplicity of modern syntax

A no-code, open-source, free, and easy 2D/3D game-making app

A game engine for high-performance cross-platform games

Free software game engine focusing on developing games faster

A free and open source fantasy computer for making, playing and sharing tiny games

A cross-platform creator for classic role-playing-games (RPGs). It’s main aim is to create games similar to the RPGs of the 80’s and 90’s but with modern features as well as support for single and multi-player experiences.

A dead simple 2D game engine for Go

A custom-made game engine based on the Raylib Framework. The Main focus is being performant and only using draw functions instead of textures. When using Shape Engine everything from Raylib is available as well.

Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware via OpenGL and Direct3D. It is used by video playback software, emulators, and popular games including Valve's award winning catalog and many Humble Bundle games.

FNA is a reimplementation of the Microsoft XNA Game Studio 4.0 Refresh libraries

Redot Engine is an open source fork of Godot with the goal of fulfilling the promise of Godot.

Ceramic is a cross-platform framework that lets you create 2D apps and games written in the Haxe programming language. It can export your app natively to Windows, Mac, Linux, iOS, Android, HTML5/WebGL and even Unity projects!