I like my PS3, and Killzone is a great game when it comes to multiplayer. But I loved Halo 3 and its multiplayer. There is no comparison IMO. Halo 3 by a mile.

I couldn't have said it any better.

KZ2 is a much better game than Halo 3. The online is equally better. The controls are better, animations, GFX, sound, # of people, maps, you name it its better.

KZ2.

Online vehicle combat.

That actually highlights what I hate about Halo 3/Quake/UT.  That last highlight where the guy gets 2 triple kills with a rocket launcher on 3 guys who just respawned.  Halo/Quake/UT are all based around weapon/power up control.  Get the weapons for your team, and deny them to the enemy.  It's a type of gameplay that I just don't like.  It's probably why I never got into Gears of War as well.

I'm a huge CS fan though, and to a lesser extent, a Rainbow 6: Rogue Spear/Ravenshield fan.  I prefer starting with the gun of my choosing, spawning in a safe location with my teammates and then going to seek and eliminate the enemy or go after the objective.  Just my preferred gameplay style.  And it's what I like about Killzone 2.  You start out in a freaking base guarded by sentry bots.  And unless your team is extremely bad, or royally f-ups, you will always be safe when you respawn.  Even when playing team deathmatch.

The above reason is probably why I stopped playing COD4 after a while.  It's stupid to get killed almost instantly after spawning because you happened to spawn right in front of someone on the other team.  There's almost nothing you can do about that.

I still don't know if Killzone 2 is going to join CS and Rainbow 6 as my favorite multiplayer games of all time, but it's probably my favorite console multiplayer game so far.  Although it has more than it's share of flaws, it still manages to be a lot of fun.

stupid thread...Halo3 by a mile...massive active population since launch = proof.

Halo3 = Multiplayer + Controls

Killzone 2 = Prettiness + StoryMode

halo 3 by a mile.

it all goes down to your own personal tastes.

For me, Killzone 2 has the most addictive and impressive multiplayer.

I never got into the Halo multiplayer, its good and freeflowing. it works perfectly for what it does, it just wasn't my thing.

K2 on the other hand, is exactly the sort of multiplayer i want. structured, gritty and tactical.

When you sell over 9,000,000 copies of a game.  The majority of those 100,000 people are generally the most hardcore Halo fans left.  It's not hard to see.  I bet if you look at the ratios of other popular shooters/games it's very similar. 

For example 9,000,000 owners of Halo 3  and there is let's just say 100,000 active players still? That's 1/90th of the userbase.  In other words about 1.1% of the total Halo ownership is still playing 2 years later.

For a game like lets say LBP....Which has sold around 2,000,000 copies.  To achieve 1.1% of it's total people playing it would need only about 22,000 people still playing 2 years after release.

I'm not saying Halo ISN'T a good game.  (While I personally don't enjoy it all that much...It was better than 2 though.) It's well made and well liked by many.   To say that it wasn't more hyped than ANY game in recent times is downright silly though.   Halo has more hype than Mario...And that's saying something.  From Doritos to Pepsi products, to minute long commericals.