The Witcher 2: Assassins of Kings is an action role-playing hack and slash video game developed by Polish studio CD Projekt RED for Microsoft Windows, Xbox 360 and OS X. It is a sequel to the 2007 video game The Witcher, and was released internationally on May 17, 2011, for Microsoft Windows and on April 17, 2012, for Xbox 360. Like its predecessor, the game is based on the book series of the same name by Polish author Andrzej Sapkowski. The game has been a critical and commercial success selling more than 1.7 million units for the PC and Xbox 360 as of May 2012.
On January 27, 2012, CD Projekt RED announced an "Enhanced Edition" of The Witcher 2 via its sister company GOG.com, which was released on April 17, 2012 on the Xbox 360. The Enhanced Edition added over 10GB of new content, including four hours of gameplay, thirty-six minutes of cinematics including a new intro and outro, and a host of fixes to gameplay and the interface. All existing owners of The Witcher 2 received free upgrades to the Enhanced Edition, and could pre-load the update starting April 11, 2012. All new copies on PC and Xbox 360 shipped with the additional content on board.