Blizzard Entertainment today announced that World of Warcraft: The Burning Crusade has broken the day-one sales record to become the fastest-selling PC game ever in North America and Europe, with a worldwide total of nearly 2.4 million copies sold in the first 24 hours of availability. The Burning Crusade, the first expansion set for World of Warcraft, was simultaneously released in North America, Europe, Singapore, Thailand, and Malaysia on 16 January, and on 17 January in Australia and New Zealand.