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.
AppGameKit is a simple cross platform game development tool that runs on Windows, Linux, MacOS and Raspberry Pi. A version to run on Android and iOS is also available. With AppGameKit you can use a simple Basic like programming language to develop cross platform applications, 2D...
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Project Anarchy is a complete end to end game engine and state-of-the-art toolset for mobile. Project Anarchy includes an entirely free license to ship your game on iOS, Android and Tizen platforms.
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GameSalad Creator is an authoring tool developed by GameSalad, Inc. (formerly Gendai Games) aimed primarily at non-programmers for composing games in a drag-and-drop fashion, utilizing visual editors and a behavior-based logic system.
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Amethyst uses gfx-rs to render graphics with Vulkan or Metal. It is meant to be used for 2D and 3D, with various utilities for both types of games. It should be beginner friendly but also allow more advanced uses such as custom render passes and GLSL shaders.
Leadwerks Game Engine provides the smoothest learning curve to take you from beginner to full-fledged game developer. Use the visual editor and the flowgraph system to set up game interactions without code. Use Lua to write your own game scripts.
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CopperCube is a 3D editor for creating interactive 3D applications or simple games for Flash / Stage 3D, WebGL or as application. No programming is necessary for this. Simply import your 3D models, specify camera controllers and behaviors, and hit 'publish'.
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Lumix Engine is an open-source 3D game design software and engine. It's written in C++ and supports several scripting languages.
Hypatia is a game engine for single player 2D action adventure games. You can use it to make a game like Legend of Zelda: Oracle of Ages and Oracle of Seasons. Hypatia is aimed at non-programmers and programmers alike.
Resonite is a free collaborative social VR & desktop sandbox platform, where users can socialize in a virtual environment and create objects, avatars & worlds together.
Moddio is a Multiplayer-First Game Engine. It has a built-in server-authoritative netcode, including snapshot interpolation and client-side reconciliation. It can support 50+ concurrent players or 300+ moving entities hosted on a $5/month VM.
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DX Studio combines the latest in real time 3D graphics technology from industry and gaming with rapid application development tools in a powerful 3d engine.
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