Blizzard Dubs World of Warcraft: Lich King 'The Fastest-Selling PC Game of All Time'
According to Blizzard, that feat was previously held by the first expansion, The Burning Crusade, which launched in January 2007 and sold 2.4 million copies day one.
Adding the frozen continent of Northrend, the Death Knight Hero class, an increased level cap and other new content to the MMO, Lich King hit November 13.
Released in 2004, World of Warcraft currently has over 11 million subscribers.
