Black Ops is best-selling game of all-time in US

Latest NPD results indictate Call of Duty: Black Ops has shifted 13.7million copies in the US alone, replaces Wii Play as best selling game of all time.
The feat is somewhat mind-blowing considering Black Ops has only been available for roughly four months. On its opening day alone it moved 5.6million in the US and 1.4million in the UK. It’s first five days on the shelves saw it rake in $650million in worldwide revenue.
Just how much the game has taken since is unknow but, during Activision’s Q4 2010 earnings call, it was stated that it had achieved over $1billion worth of sales in its first six weeks.