One of the most popular alternatives to Unity is Godot Engine, which is free and open source. Other popular alternatives are Unreal Engine, GDevelop, Candlestick and CRYENGINE. You're spoiled for choice with Game Development Tools like Unity: we list more than 100 alternatives for Windows, Linux, Mac, the web and Android.
Alice is an innovative 3D programming environment that makes it easy to create an animation for telling a story, playing an interactive game, or a video to share on the web. Alice is a teaching tool for introductory computing.
United States
SpriteKit is a general-purpose framework for drawing shapes, particles, text, images, and video in two dimensions. It leverages Metal to achieve high-performance battery-efficient rendering and 2d games and other graphics-intensive apps.
United States
LunarEngine (formerly Librebox) is an open-source game engine powered by Luau. It delivers a sandbox-style API and development model inspired by popular sandbox engines, so existing Luau code runs with minimal changes.
Keolot Phaser Editor is a free visual development environment for 2D browser games on the open source Phaser engine with integrated Matter JS physics. The application has a built-in ability to visually create and edit scenes, game objects, animations, audio and keys, write game...
Ursina makes it easier to develop games, visualizations and other kinds software. The concise API combined with the power of the Python programming language, makes life easier for the developer so they can focus on what they are making.
Free online 3D Game Maker. Make your own 3D games online! Create Games for Web, Mobile and Desktop. Easy to use.
Game Builder is an experimental game-building sandbox. Create games within a 3D game world you create. Choose from thousands of ready-made 3D models through Poly. Design game logic by arranging various blocks in a sleek drag-and-drop interface.
United States
Whitestorm.js is a framework for 3D web apps built with Three.js technology. It implements a core for fast development of a 3D scene with physics.
Russia
A game engine written in Python, extending support across multiple GPU devices with 3D rendering, PBR Renderer and much more.
Viz4D helps you create top-performing web-based 3D viewer that works great on mobile and VR. It is tailored for real-time Archviz walkthrough, 3D product configurator and presentation.
United States
ZGameEditor lets you create 3D games with procedural content that have a redistributable size of 64 KiB or less. It consists of a lightweight OpenGL-powered engine that runs on Windows, Mac, Linux & Android, and a portable Windows IDE featuring real-time editing.
Sweden
EU
