depends on what you like, killzone2 may not of sold what halo3 sold, killzone is so much better in everyway, it is a halo killer, sales dont matter to me much, for the most part people who like fps bought a 360 , adventure games, sports, all others bought a ps3, now sony is droping some killer pfs, now do they have the amount of people buying there console that play fps, to make great sales, ? dont know, all i know is if killzone was on 360 halo sales would drop . so ps3 shooters i like better then 360s