Anno 2070 is a city-building and economic simulation game, with real-time strategy elements. It is the 5th game of the Anno series. It was released on 17 November 2011, and was co-developed by the German studios Related Designs and Blue Byte, and published by Ubisoft. Anno 2070 required Uplay to operate as an always online DRM System, later removed for receiving severe criticism from players.