Modern Warfare 2 made a total of $310m in sales revenue across North America and the UK in its first day on sale.
According to the latest figures from Activision, the game sold a whopping 4.7m units in the two territories across 24 hours.
The news comes following confirmation that around 1.2m of those copies were sold in the UK - and again reaffirms Activision's claim that the game is 'the biggest entertainment launch in history'.
"The Call of Duty franchise has become a cultural phenomenon showing the power of video games as an entertainment medium," said Mike Griffith, CEO, Activision Publishing.
"The shattering of these entertainment records is a testament to the compelling, cinematic and uniquely engaging experience that the Call of Duty brand delivers. Modern Warfare 2 has taken interactive experience to unprecedented heights setting a new standard for entertainment."