Like the previous entries in the Red Alert series, the game is set in an alternate reality from World War II, in which the Western Allies fight the Soviet Union. Command & Conquer: Red Alert 3 – Uprising, a stand-alone expansion pack, was released for Microsoft Windows in March 2009. The game is a continuation of the Red Alert games within the Command & Conquer series. In addition, Command & Conquer: Red Alert 3 – Ultimate Edition, the PlayStation 3 version which contains additional material was released on Maalong with the OS X version by TransGaming. An Xbox 360 version was released on November 11. It was released in October 2008 in the United States and Europe for Microsoft Windows. Command & Conquer: Red Alert 3 is a real-time strategy video game developed by EA Los Angeles and published by Electronic Arts.