Leading online retailer Amazon.co.uk has announced that Call of Duty: Modern Warfare 2 has become its biggest selling pre-order video game of all time, overtaking previous record holder Grand Theft Auto 4.

"The level of interest in Call of Duty: Modern Warfare 2 has been unprecedented," said Chris Poad, Director of Video Games at Amazon.co.uk. "We have seen demand increase rapidly as the release date has drawn closer and it is now benefiting from over 50 per cent more pre-orders than we saw for Grand Theft Auto 4. That is an incredible achievement."

Call of Duty: Modern Warfare 2 for Xbox 360 and PS3 are currently available to buy at Amazon.co.uk priced at £32 for Xbox 360 and PS3.