World of Warcraft (commonly known as WoW) is a massively multiplayer online role-playing game (MMORPG) released on November 23, 2004. Its expansion, The Burning Crusade was released on January 16, 2007.
World of Warcraft sales
World of Warcraft was the best-selling PC game of 2005 and 2006. As of January 22, 2008, World of Warcraft has surpassed 10 million subscribers worldwide, with more than 2 million subscribers in Europe, more than 2.5 million in North America, and about 5.5 million in Asia.
The Burning Crusade
The Burning Crusade expansion first expansion sold through nearly 2.4 million copies worldwide in its first 24 hours and 3.5 million in its first month - more than any other PC game in history had sold within an entire first month of availability.
On January 28, 2008, Blizzard announced WoW had hit 10 million online subscribers. According to Blizzard, WoW now hosts more than 2 million subscribers in Europe, more than 2.5 million in North America, and approximately 5.5 million in Asia.
Wrath of the Lich King
Wrath of the Lich King sold 2.8 million copies in it's first 24 hours of availability. This makes it the fastest selling computer game of all time, beating the record set by the previous World of Warcraft expansion The Burning Crusade, which sold 2.4 million within its first 24 hours.