Blizzard's back in the news front with some more Burning Crusade numbers. The company announced today that World of Warcraft's Burning Crusade expansion has sold through approximately 3.5 million copies within one month following its mid-January launch in North America, Europe, Australia, New Zealand, Singapore, Thailand and Malaysia.

This figure, which enshrines Burning Crusade as the new record-holder for PC-game sales within one month, includes nearly 1.6 million sold in Europe, and more than 1.9 million sold in regions that play on North American realms, including more than 100,000 copies in Australasia.

World of Warcraft's worldwide subscriber base is now more than 8.5 million strong, and it's still continuing to grow as new and returning players join existing players in the game.

"We're thrilled about the overwhelming response that we've received for The Burning Crusade," said Mike Morhaime, president of Blizzard Entertainment. "We have worked hard to build upon nearly every aspect of World of Warcraft with this expansion, and it’s gratifying to see that players and reviewers are enjoying the new content."