[quote]In the U.S., Halo 3 sold 3.3 million copies in its first 12 days on sale,[118] increasing to 3.7 million copies by November 15, 2007.[119] Reuters UK estimated that Halo 3 may have sold up to 5.2 million copies worldwide in the first two weeks after launch.[3] By November 30, 2007, Halo 3 had sold 5 million copies worldwide, and as of that point, was the best-selling video game of 2007 in the U.S., even though the game is only available on one console.[120] On January 3, 2008, Microsoft announced that Halo 3 has sold 8.1 million copies.[121] The game drew over a million Xbox Live members to play online in the first 20 hours, making it the biggest day for Xbox Live gaming in history.[4][122] The game returned to the top 20 sales charts more than a year after its release in February 2009; Gamasutra reported that the boost might have been due to the release of Halo Wars.[123] As of January 2008, 8.1 million copies have been sold.[121][/quote]