Unity is a cross-platform game creation system developed by Unity Technologies, including a game engine and integrated development environment (IDE). It is used to develop video games for web sites, desktop platforms, consoles, and mobile devices. First announced only for Mac OS, at Apples Worldwide Developers Conference in 2005, it has since been extended to target more than fifteen platforms. It is now the default software development kit (SDK) for the Wii U.

Unity is notable for its ability to target games to multiple platforms. Within a project, developers have control over delivery to mobile devices, web browsers, desktops, and consoles. Supported platforms include BlackBerry 10, Windows Phone 8, Windows, OS X, Linux (mainly Ubuntu), Android, iOS, Unity Web Player (includingAdobe Flash, PlayStation 3, PlayStation 4, PlayStation Vita, Xbox 360, Xbox One, Wii U, and Wii. It includes an asset server and Nvidia's PhysX physics engine. Unity Web Player is a browser plugin that is supported in Windows and OS X only. Unity is the default software development kit (SDK) for Nintendo's Wii U video game console platform, with a free copy included by Nintendo with each Wii U developer license. Unity Technologies calls this bundling of a third-party SDK an "industry first".

Unity Pro is available for a fee, and Unity Free has no fee; it is available for any use to individuals or companies with less than US$100,000 of annual gross revenue. On March 3, 2015 Unity Technologies made available the complete engine with their upcoming new version 5 (Unity 5) for free including all features, less source code and support

Installation:
1 - Install Unity (DO NOT RUN IT).
2 - Run patch as Administrator.
3 - Select "Unity folder" by pressing "Browse" button.
OR
3 - Copy the "Patch file" in "Unity folder".
(default : "C:Program Files (x86)UnityEditor"
3 - Select Unity version by pressing "drop-down menu" (if needed).
4 - Click the "Patch" button to start the patching process