One of Sony’s biggest games of 2009 is undoubtedly Killzone 2. Even though the game has yet to be released, Dutch magazine ‘Power Unlimited‘ is reporting Guerilla Games is already hard at work creating a few more installments.

The studio has a total of three teams who work inside the company and according to the magazine, one of them is developing Killzone 3 for the PS3. Although no other information is detailed, it looks like Sony is already betting that Killzone 2 is going to be a huge success — and who can blame them?

Also, another team has already begun work on a sequel to the handheld version of Killzone: Liberation for the PSP. The mag believes the next installment should be out sometime in 2010.

Sony is shipping Killzone 2 on February 27, 2009.