Modern Warfare 2 has sold more copies than any other game released in the UK.
Last week, it surpassed sales of Dr Kawashima’s Brain Training on Nintendo DS.
The achievement was reached in 41 weeks. The game has spent only three weeks outside the all-formats top ten chart.
By comparison, it took Brain Training 36 months to overtake previous record holder Grand Theft Auto: San Andreas.
The title had sold over 20 million copies worldwide by June 2010.