Lost Cities is card game for the Xbox 360, based upon the popular card game of the same name by game designer Reiner Knizia, published by Sierra Online. In early 2009, Lost Cities was removed from the Xbox Live Marketplace. At the time, it was only the second game for which this has happened. No official reason was given for the removal, but speculation centered on copyright issues over the merger of Activision and Vivendi, the latter being the parent company of Sierra, publisher of Lost Cities.