Who has the better Zombie game?

A lot of people are going on about how Call of Duty World at War and Black Ops has the best Zombie mode ever (I don't know why I capitalized the "Z" in Zombie, but it just feels right). I keep going on to tell them than Left 4 Dead is literally the best one because that's all Valve focus's on is just Zombies. Now, I haven't played the Zombie modes in World at War or Black Ops, but it's safe to assume that Left 4 Dead will always satisfy me when I want to kill a lot of Zombies. The way I look at it is, would you rather go to Wal-Mart for all your gaming needs or Gamestop? You would rather to a place that focus's on just games because most of the time they can help you with what you need (I understand some of your arguments on Gamestop, but I'm just trying to make a point). 
 
So what do you guys think? Is this just Activisions hype that's blinding gamers from what the real deal is? Or does World at War and Black Ops truly have the best Zombie game out there?

I really do need opinions on this. So bump.

Left 4 Dead games, mostly because I love the characters.

Never saw a single zombie in Left 4 Dead. 
I did enjoy it a lot though back when it released and a few months forward but Nazi Zombies has kept me way more entertained. 
That shit gets so intense and all the great support Treyarc put towards that mode was great so I myself pick that over Left 4 Dead any day. 

Poll?

Left 4 Dead is just more mechanically interesting to begin with. 
 
The atmosphere, setting, characters, and undead are way better too, but hey whatever goes bro.

I vastly prefer Treyarch's zombies. Can play it for hours, for me it captures the whole notion of trying to survive in some abandoned building somewhere during a zombie invasion, boarding up the windows, setting up traps, saving your ammo, all that sorta stuff makes it a great atmosphere which just seems to be lacking in L4D. Plus the little flair of insanity that Treyarch add with the mystery box, alien weapons, power ups, etc, just make it a hell of a lot of fun.

Obviously a game focused around zombies with interesting characters is going to be better-made (for most people) than a side-mode of a military FPS.  That said, the BlackOps/WAW Zombie modes is "hell of" fun with a friend in split screen.  Crazy moments to be had.

I can definitely see the attraction of the CoD Zombie mode.  Being stuck in one location and trying to keep it fortified is compelling and a lot of fun for me conceptually.  What I don't care for in the CoD Zombie mode is the fact that it is just survival mode (ie. keep playing till you die).  I don't mind that type of game play but I prefer L4D because survival mode is just one of the modes.  I can still play something that has a deeper objective than just stay alive.

" Poll? "

" I vastly prefer Treyarch's zombies. Can play it for hours, for me it captures the whole notion of trying to survive in some abandoned building somewhere during a zombie invasion, boarding up the windows, setting up traps, saving your ammo, all that sorta stuff makes it a great atmosphere which just seems to be lacking in L4D. Plus the little flair of insanity that Treyarch add with the mystery box, alien weapons, power ups, etc, just make it a hell of a lot of fun. "

Plants vs. Zombies.

Kind of tough to compare a full game to a mode in another game. They're also completely different styles of gameplay. One is defending a point against zombies, the other is point A to point B.
 
Left 4 Dead is probably "better", but you have to buy a whole game, it isn't just a part of another game you already own. Besides, Killing Floor is better than both of them.

Dead Space is the closest thing to a perfect zombie survival game. IMO

Left 4 Dead has the best modern zombies while the original Resident Evil games have the greatest slow-moving shuffling zeds.

The best zombie game hasn't been made yet, but I'm working on it.

The little bit I've played of WaW tells me that the two are not at all intended to be compared. They get their scares in completely different ways. L4D's standard infected aren't scary, but whenever a Special Infected does their job effectively (or a Tank shows up, or, as a newb, you encounter a Witch) it is scary as hell. Now, granted, I'm pretty dulled to L4D after 40 to 60 hours of play between the two games, but those were the aspects of the game that were initially scary. The other scary thing about L4D, of course, are "dread zones"; sections of individual levels from the campaign where, in versus mode, strong special infected players KNOW they can screw the survivors. For example, the original L4D had three or four dread zones in "No Mercy", and of course, there's the corn field in "Blood Harvest." 
 
Alternatively, WaW (and, by extension, Black Ops) is scary because of the "lurching horror." More similar to George A. Romero's Night of the Living Dead than the clear 28 Days Later inspiration of L4D, individual zombies actually soak bullets that aren't aimed straight at their head. As a result, the individual zombies actually offer more of a threat, even if individual zombies are still pretty easy to deal with. However, the horrific elements of WaW really step in as more areas of the building become available. With two players, you quickly become overwhelmed each trying to cover four or five entry points; with four players, you're still doomed. It'll all end eventually, and that's what makes the CoD Zombies mode scary; the sense of inevitable defeat encroaches on your subconscious as your conscious mind realizes that you're starting to become overwhelmed. 
 
If you're not looking for a scare, though, then I'd argue that the L4D titles are better than WaW. With more going on, more variation in levels, and a versus mode, the game is just more consistent, and the shooting mechanics in WaW just aren't as solid as those in the IW games. That said, I haven't played Black Ops yet, so if the mechanics of Black Ops are more akin to the Modern Warfare games than to WaW, preference of the CoD mechanics could be enough to make the Black Ops zombies mode a better recommendation. I'm personally not that into the CoD mechanics anymore, so I know I'd prefer more L4D, but I could understand somebody who likes CoD preferring the Black Ops zombies mode when they're not chasing a scare.

I'm gonna let you finish, but Capcom had one of the best zombie franchises OF ALL TiME.

" Kind of tough to compare a full game to a mode in another game. They're also completely different styles of gameplay. One is defending a point against zombies, the other is point A to point B.  Left 4 Dead is probably "better", but you have to buy a whole game, it isn't just a part of another game you already own. Besides, Killing Floor is better than both of them. "

" I'm gonna let you finish, but Capcom had one of the best zombie franchises OF ALL TiME. "

It's a matter of whether you prefer run and gun action, or claustrophobic survival.

" @Romination said:

" I'm gonna let you finish, but Capcom had one of the best zombie franchises OF ALL TiME. "

"

" @ExitMusic said:

" Kind of tough to compare a full game to a mode in another game. They're also completely different styles of gameplay. One is defending a point against zombies, the other is point A to point B.  Left 4 Dead is probably "better", but you have to buy a whole game, it isn't just a part of another game you already own. Besides, Killing Floor is better than both of them. "

I'm only comparing them because I keep hearing other people claim that WaW and Black Ops Zombie mode is better than L4D. If you want a true comparison, then compare L4D's Survival mode with WaW and Black Ops Zombie mode. Those 2 modes are pretty identical right? "

Let's look at it this way: COD BO has a zombie mode while L4D is a zombie game. Now, if you say COD zombie mode is better then you are saying that something  Treyarch did a mod or an add-on is better than something Valve did as a game. That does put Treyarch a better game developing company than Valve. That is something I am not going to agree with.  
 
Having said that, I am sure COD BO zombie mode is fun to play and very successful because it was brought back from COD WAW, but I think Valve put more effort on making L4D.

I can't think of an appropriately sarcastic and witty game comparison between two conceptually similar but mechanically different games here that is quite as invalid as comparing L4D and Nazi Zombies, so just pretend I did and quote me with a "this".