Sony's PS3 shooter Killzone 2 has stormed the UK charts at number one this week, making it the first all-formats number one for the firm in almost two years.

The title becomes the fourth fastest-selling game for Sony in the UK, and the second fastest-seller on the PlayStation 3 behind GT5 Prologue.

Last week's number one, Street Fighter IV, saw sales drop 49 per cent as it slipped to number three according to GfK Chart track data, leaving Microsoft's Halo Wars to enter the charts at number two.

Apart from Professor Layton and the Curious Village at number five, all the other titles in the top ten lost sales for the week ended February 28.

The only other new entry this week is Konami's Silent Hill: Homecoming, which debuts at a respectable number 11.

■01 Killzone 2
■02 Halo Wars
■03 Street Fighter IV
■04 Wii Fit
■05 Professor Layton and the Curious Village
■06 Sega Mega Drive Ultimate Collection
■07 FIFA 09
■08 Call of Duty: World at War
■09 Ben 10: Alien Force
■10 Mario Kart Wii