For several years, the engine was uncontested on the iPhone and it became well-known with iOS game developers. When Apple launched its App Store in 2008, Unity quickly added support for the iPhone. It included a Networking Layer for developers to create multiplayer games based on the User Datagram Protocol, offering Network Address Translation, State Synchronization, and Remote Procedure Calls.

The release also added features whereby developers could collaborate more easily. The release included an optimized terrain engine for detailed 3D environments, real-time dynamic shadows, directional lights and spotlights, video playback, and other features. Unity 2.0 launched in 2007 with approximately 50 new features. Unity was initially released for Mac OS X, later adding support for Microsoft Windows and Web browsers. The next year, Unity was named runner-up in the Best Use of Mac OS X Graphics category in Apple Inc.'s Apple Design Awards. The Unity game engine launched in 2005, aiming to 'democratize' game development by making it accessible to more developers.

The engine has been adopted by industries outside video gaming, such as film, automotive, architecture, engineering, construction, and the United States Armed Forces. The engine can be used to create three-dimensional (3D) and two-dimensional (2D) games, as well as interactive simulations and other experiences. It is particularly popular for iOS and Android mobile game development, is considered easy to use for beginner developers, and is popular for indie game development. The engine has since been gradually extended to support a variety of desktop, mobile, console and virtual reality platforms.

Unity is a cross-platform game engine developed by Unity Technologies, first announced and released in June 2005 at Apple Worldwide Developers Conference as a Mac OS X game engine.

Unity development kit