World of Warcraft is showing no signs of stopping with the announcement that it's surpassed 9 million subscribers worldwide.

According to its makers, Blizzard Entertainment, say that the latest expansion pack Burning Crusade is responsible for the increased subscriptions.

“We’re thrilled that gamers around the world have continued to embrace World of Warcraft so enthusiastically,” said Mike Morhaime, president and co-founder of Blizzard Entertainment.

The latest announcement comes just six months after the company announced 8 million subscribers back in January.

The company says it is currently working with its partner for World of Warcraft in China, The9, to prepare the game’s first expansion, World of Warcraft: The Burning Crusade, for launch in mainland China and anticipates an influx of new and returning subscribers in conjunction with that event.