All of them?

Gears Of Halo Zone. is the best =]

I played killzone 2 all it has above the other 2 games is graphics, everything else is better than killzone 2 in both games, gameplay, online, features, fun factor, thats the facts whoever don't like what I said, you dont have to like it.

Halo 3 = best fps
Gears of war = best tps

Gears of war = my favorite shooter of all time, fun factor off the charts.

Coming from a player whose main console is the 360, I got to admit that I am really enjoying KZ2.  It's not the graphics (they're good, but not mind blowing) but the game just has that realistic feel that I am in the middle of War and not a one man killing machine.  Kind of like COD4.

I'm enjoying KZ2 more than Gears 2 (the end boss put a major downer on a great game) and definitely more than Halo 3. 

I still put the original Gears in front of all of them.  It had been a long time since a game truly wowed me and Gears managed to do just that.  But KZ2 has gotten me playing my PS3 again and really enjoying it.  Thanks Guerilla for taking the time and putting out a superb game.

Don't you mean Halozone of war?

My presonal opinion:

1. Gears of War 2
2. Halo 3

Killzone 2 - have not played yet

I don't think that any of these games rate very high in my all-time list, and they don't even top my shooter list either.

I think the Helghan solider would probably be the easiest to kick the hiny of, and get the heck outta there, so I vote Helghan.

Killzone 2.
I have played Gears of war 1 and 2 trough,
I have played Halo 3 multiplayer and single.
But Killzone 2 easily wins.

well, my favorite is without a doubt gears of war 2. just too much fun for me.

id say all 3 games are worth a few play threw's.