If you're just interested in purchasing Killzone 3's multiplayer without buying the full game, then Sony has some good news for you.
Customers will have the chance to purchase Killzone 3's multiplayer mode without buying the game, what's even better is that the game is free to download, but once you reach a certain level then you have to purchase the multiplayer, which is just $14.99.
The multiplayer mode contains DLC and will be available for PlayStation Network users next week.
pretty good news