 Halo 3 was phenomenally successful upon release. The game made $ 170 million in US sales on the first day of release, generating more money in 24 hours than any other American entertainment property up to that point. Halo would make an additional $ 130 million by week's end and sell 3.3 million units by the end of the month. By 2008, Halo 3 had sold 4.8 million units in the United States for a total of 8.1 million units worldwide, making it the best-selling game of 2007 in the United States.
