Which One Should I Buy? "Call Od Duty 4" or "Killzone 2"

I Already Bought Killzone 2, but, im scared to open it, lol......I'm just not sure whether its better than call of duty 4.
Any Suggestions?

EDIT: I Already Have Quite A Few Shooter Games....Is Little Big PLanet Worth The 60 Dollars?

THANKS...........:biggrin:

get call of duty 4 its better

Call of Duty 4. I heard Kill Zone's online sucked. CoD4 = Epic Campaign and Epic Online.

call of duty 4, killzone online sucks a right nut, my mom got it for me and i was all excited and stuff, i didnt play for more than 15 minutes

I agree.. COD 4 kicks ass more...

I agree with everyone here, COD4 is awesome. But LBP was pretty good to (not sure if it is better then COD4 though). But remember, Modern Warfare 2 is coming out in November so you definitely need that one to.

Buy KZ2 and LBP then buy Modern Warefare 2.

killzone has some weird controls, and are somewhat difficult to get used to
i say cod4

call of duty 4

COD4, no doubt

get COD 4 hands down and this........http://cgi.ebay.com/New-Tom-Clancys-...3A1%7C294%3A50

Im a little late, but if you havent decided to buy call of duty 4 yet... i say killzone 2, once you get use to the controls its a blast, and online can get addicting if you know what your doing.