Blizzard Entertainment today announced that Wrath of the Lich King, its second expansion pack for World of Warcraft, has sold more than 2.8 million copies in its first day of availability, making it the fastest-selling PC game of all time. The record was previously held by the studio’s other expansion for WoW – The Burning Crusade – released back in January 2007, selling nearly 2.4 million copies during its first day at retail.

“We’re grateful for the incredible support that players around the world have continued to show for World of Warcraft,” said Mike Morhaime, CEO and cofounder of Blizzard Entertainment. “Wrath of the Lich King contains some of the best content we’ve created for the game so far, and we look forward to seeing even more players log in to experience it in the days ahead.”

The expansion adds a whole new continent to explore, the Death Knight hero class and more. World of Warcraft, prior to the launch of the expansion, had more than 11 million players.