Unity is a cross-platform game engine that is easy to use and has powerful features. It is available for free and has no limits on game size, number of developers, or game complexity. It supports most modern and even older operating systems, and the free version includes all the basic features needed to create a game. The Unity Game Engine is easy to use and learn, even for beginners. It also has a great documentation section and forum for users to find answers to their questions. Unity has a ton of features for developers to create games, including but not limited to, a C#-based scripting system, built-in physics engine, support for importing and exporting of 3D models, cross-platform support, and 2D/3D tools. Unity is an industry standard game engine with many uses and can be used for games of all types, but it is also great for making interactive 3D content for the web.