World of Warcraft’s monthly subscriber number has dropped to 7.7 million, Blizzard has announced.

That’s 600,000 subscribers fewer than the game had in March of this year, and a figure that’s comparable to the game’s subscriber numbers in 2007, shortly before first expansion The Burning Crusade pushed it past the eight million mark.

Last year’s Mists of Pandaria expansion saw subscriptions rise to more than 10 million by October.

World of Warcraft’s subscriber base peaked at about 12 million in October 2010 – two months before third expansion Cataclysm was released.

Earlier this month Blizzard announced that micro-transactions would be coming to the game, first in Asia and then the West.