Halo 3
Halo 3 sales reached $170 million within 24 hours, making it the biggest selling entertainment product launch in US history. It beat the previous record set by Halo 2 in 2004. It was the best selling video game of 2007 in the US, despite only being available on Xbox 360. On January 3, 2008 Microsoft announced Halo 3 has sold 8.1 million copies worldwide.