Quote:
PARIS, France. -- December 13, 2010 -- Blizzard Entertainment, Inc. today announced that World of Warcraft®: Cataclysm™, the third expansion for the critically acclaimed massively multiplayer online role-playing game (MMORPG), sold through more than 3.3 million copies as of its first 24 hours of release*, making it the fastest-selling PC game of all time. This milestone eclipses the previous record of more than 2.8 million copies sold in 24 hours, set in November 2008 by Blizzard’s second World of Warcraft expansion, Wrath of the Lich King®.
More in the press release link.