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.

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

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.

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.

Recoil is a battle tested open-source RTS engine that, allied with a flexible Lua API, allows you to implement the perfect UI and mechanics for your game with the ability to support thousands of complex units simultaneously.

RPG Paper Maker allows you to create a 3D RPG with 2D sprites and 3D objects with a very simple interface

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.

Prowl is an open-source, MIT-licensed game engine developed in pure C# in latest .NET. It aims to provide a seamless transition for developers familiar with Unity by maintaining a similar API while also following KISS and staying as small and customizable as possible. Ideally, Unity projects can port over with as little resistance as possible.

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!

Volta is a WIP 2D game development framework for Luau written in C++. It is cross platform, currently only officially supports Windows, Linux and macOS (though macOS has no official builds, so you will have to compile the framework yourself for it). Android and iOS support is planned in the future.

A free and open-source, cross-platform game engine for creating 2D and 3D projects with Lua or C++. It is lightweight and promotes the simplest way to use the best performance of a data-oriented design.

A game development tool that allows anyone to enjoy creating RPGs with intuitive operation and advanced features without programming

Cross platform 2D games based on the Qt framework.

2D game engine made on top of Flutter

2D/3D content creation tool integrating a flexible and visual editor system