Has achieved the biggest initial success at retail of any first-party PS3 title to date.

Killzone 2 screenshot

Sony Computer Entertainment America has announced that Killzone 2 has now sold more than one million copies worldwide.

SCEA notes that the "only on PlayStation" experience has garnered the biggest initial success at retail of any first-party PS3 title to date. The platform holder added that it expects the title will "continue to drive incentive for hardware sales throughout the year".

Killzone 2 was released on February 27 and you can read why it's worthy of its success in the VideoGamer.com review.