Blizzard has announced that the recently released World of Warcraft expansion pack, Cataclysm, has sold through more than 4.7 million copies as of its first month of release, setting a new record for monthly PC-game sales.

World of Warcraft: Cataclysm was simultaneously released in the United States, Canada, Mexico, Argentina, Chile, Europe, Russia, Southeast Asia, Australia, and New Zealand on December 7th , and became available in Korea and the regions of Taiwan, Hong Kong, and Macau on December 9th.

With day-one sales topping 3.3 million copies, World of Warcraft: Cataclysm became the fastest-selling PC game of all time, shattering the previous record, which was held by the second World of Warcraft expansion, Wrath of the Lich King.