Activision Blizzard has sold over 4.7 million units of World of Warcraft: Cataclysm in one month of release.
That's the latest figures from the publisher, which includes High Street and digital distribution sales.
"We created thousands of new quests, introduced new lands to explore, and extensively revamped the game world for World of Warcraft: Cataclysm, making it our biggest and most ambitious expansion yet," commented Mike Morhaime, CEO and co-founder of Blizzard Entertainment.
"We've been floored by the community's response so far, and we'd like to thank them for their continued passion and support for World of Warcraft, and for helping Cataclysm reach this incredible milestone."
On release on December 9 the game sold 3.3 million units worldwide, according to the publisher. Before launch, the World of Warcraft had 12 million subscribers.