Konami has sold 4.33 million copies of Metal Gear Solid 4 around the world.
The stealthy PS3 exclusive helped Sony's platform account for 38 per cent of Konami games sold between April and September 2008.
This compares favourably to the piddly 1 per cent of Konami games sold on PS3 during the same period last year.
Despite the pulling power of Metal Gear Solid 4, Kojima has maintained that we will definitely not see an Xbox 360 version of the game, despite public support for the idea from Microsoft.
MGS4, which launched back in June, will also be the last of the series helmed by creator Hideo Kojima. He's promised that MGS games will continue to appear, but under the supervision of younger members from his team.
Today also marks the arrival of a PS3 demo of Metal Gear Solid 4: Guns of the Patriots. Better late than never, eh?
Head over to our Metal Gear Solid 4 review to find out more.