Blizzard has announced that the second expansion pack to World of Warcraft called Wrath of the Lich King has broken sales records for launch day. The expansion pack sold more than 2.8 million copies in its first 24 hours of availability making it the fastest selling PC game of all time.

The previous record was 2.4 millio9n copies sold in the first 24 hours, which was the record set by the first expansion for WoW, The Burning Crusade. Blizzard says that over 15,000 stores worldwide opened at midnight for the game launch day and many locations had special events and had Blizzard personnel appearances.

“After a single day of availability, Wrath of the Lich King is already the bestselling PC game of 2008 at GameStop and ranks as one of our top-selling products so far this year,” said Bob McKenzie, GameStop’s senior vice president of merchandising. “In keeping with the tradition established by their previous releases, Blizzard Entertainment has again created a product that not only reflects their high standards of quality but is clearly an instant hit with gamers around the country.”

Via Blizzard