 From its release in October to the end of 2008, Fallout 3 shipped over 4.7 million units. According to NPD Group, as of January 2009, the Xbox 360 version had sold 1.14 million units, and the PlayStation 3 version had sold 552,000 units. The Xbox 360 version was the 14th best-selling game of December 2008 in the United States, while the PlayStation 3 version was the 8th best-selling PlayStation 3 game in that region and month. Electronic Entertainment Design and Research, a market research firm, estimated that the game had sold 12.4 million copies worldwide.
