A web-first game engine

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.

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.

A powerful, beautiful, simple, and open web rendering engine

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

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.

Free software game engine focusing on developing games faster

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

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

LWJGL is a low-level Java library that enables cross-platform development

KNI, a fork of Microsoft's XNA Framework, is a simple and powerful .NET framework for creating games for desktop PCs, Mobile devices, Virtual Reality headsets and the Web, using dotnet framework & the C# programming language.

An open-source, 3D game engine forked from the old Blender Game Engine and deployed with Blender itself

A free, all-in-one, cross-platform game engine that makes it easy for you to create 2D and 3D games.

Unreal Engine enables game developers and creators across industries to realize next-generation real-time 3D content and experiences with freedom, fidelity, and flexibility

An engine to build highly optimized web-based 3D and XR apps that run on any device

A cross-platform game engine used worldwide. The engine can be used to create three-dimensional (3D) and two-dimensional (2D) games, as well as interactive simulations.

Matali Physics is an advanced, modern, multi-platform, high-performance 3d physics environment intended for games, VR, AR, physics-based simulations and robotics.

The 8th Wall Studio Game Engine is a powerful, browser-based development environment designed to build cross-platform 3D & spatial (XR) games directly on the web.

anitya is offers a low-code software toolkit designed to empower creators brands to effortlessly develop immersive 3D experiences, including gamified training modules, collaborative workshops, and e-commerce solutions.

A versatile game engine designed for creating 3D games and experiences. It includes landscape sculpting, a physics engine, customizable shaders, and procedural foliage generation.

A Zig game engine & graphics toolkit, for building high-performance, truly cross-platform, robust & modular games, visualizations, and desktop/mobile GUI apps

A procedural, node-based design & animation tool, for the web

An easy to use, lightweight, cross-browser, general purpose 3D library

A web framework for building virtual reality experiences

A simple Lua framework for rapidly building VR experiences

Hotham is an attempt to create a lightweight, high performance game engine for standalone VR headsets, like the Oculus Quest 2

The Irrlicht Engine is an open source realtime 3D engine written in C++

3D Real Time engine and visualization tools for the Industry, scientists & education.

Apple's first-party 3D engine

A Unity3D-like environment to create WebXR enabled apps and games for the browser with three.js