ezEngine is a free, open source game engine written in C++. Its philosophy is to be modular and flexible, such that it can be adapted to many different use cases. EZ utilizes a plugin system to integrate features such as FMOD or Jolt Physics.

Defold Engine is described as 'The completely free and source-available game engine Defold solves the technical issues we all have in common when making games. That way, you can focus on being creative and building a great game' and is a game development tool in the development category. There are more than 50 alternatives to Defold Engine for a variety of platforms, including Windows, Linux, Mac, Web-based and Android apps. The best Defold Engine alternative is Godot Engine, which is both free and Open Source. Other great apps like Defold Engine are Unity, Unreal Engine, GDevelop and Wick Editor.
ezEngine is a free, open source game engine written in C++. Its philosophy is to be modular and flexible, such that it can be adapted to many different use cases. EZ utilizes a plugin system to integrate features such as FMOD or Jolt Physics.

Stencyl isn't your average game creation software; it's a gorgeous, intuitive toolset that accelerates your workflow and then gets out of the way. We take care of the essentials, so you can focus on what's important - making your game yours.



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.
3D game engine that uses web technologies. Perfect for those who already know TypeScript and want to collaborate with designers and artists to create 3D experiences.




Verus Engine is a modern, platform-agnostic 3D game engine. It is developed using C++ and HLSL. It is based on Direct3D 12 and Vulkan graphics APIs. The code is user friendly and well optimized.



HARFANG®3D is a cross-platform & multi-language solution to integrate with embedded systems, existing environments & combining features to meet the industrial standards of 3D imaging.




DragonRuby Game Toolkit is a professional grade 2D game engine. It's tiny (~3.5MB), fast, and cross-platform (including consoles and mobile).
The Source SDK is a software development kit compiled by Valve Software that is used to create maps or mods for the Source engine, with the exception of Left 4 Dead, Left 4 Dead 2, and Alien Swarm. These games are packaged with their own SDKs, called the Left 4 Dead Authoring...

A feature-rich, production-ready, general purpose 2D/3D game engine written in Rust with a scene editor. Formerly known as rg3d.

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.



A game engine written in Python, extending support across multiple GPU devices with 3D rendering, PBR Renderer and much more.


Pixel Game Maker MV allows you to build up your own action game with no programming knowledge necessary. This engine was designed with the idea of giving a voice to people's passions, allowing them to freely express the game that they have held in their hearts.



