Modern Warfare 2 has sold 1.23m copies in the UK in one day, smashing the previous record set by Grand Theft Auto IV (631,000 units).
That performance made Activision around £47m, whereas Rockstar made only £27.2m.
"These first day sales figures are astonishing and clear evidence that videogames are now mainstream in the UK," said Michael Rawlinson, boss of data collector ELSPA/GfK-ChartTrack.
Modern Warfare 2 was released yesterday, on Tuesday 10th November. Our review is clear and visible to all.