Hunde Des Krieg said:
If you stand around long enough the "horde" is supposed to come after you.
Also they aren't quite zombies they are just vicious mindless violent people, and some mutants.
As just people that are overly violent they are easy enough to kill, they most likely feel no pain.
*ahem*
Wow, this topic got crazy.
There are still quite a few folks who want to make this argument that the zombies in L4D are not supposed to be zombies. This is a bad argument for several reasons.
1) Since before its release this has been touted as a "zombie" game.
2) The back of the package, the instruction manual, the graffiti on the walls and the dialogue between characters during gameplay make constant references to "zombies" and directly refer to the monsters in the game as "zombies."
3) At the end of each stage after the stats roll by it says "(# of zombies) were harmed in the making of this film."
Anybody trying to make the argument that these are not supposed to be zombies is simply not paying attention.
Moving along, the cool thing about fantasy is that we can do whatever we'd like with it. One idea of "zombies" may clash with another and it's all good. I think that when I originally posted this I was a bit disappointed that L4D was not the Romero film in game form that I was hoping for. In any case, I do love L4D and if Valve's idea of zombies are something of a cross between 28 days later style RAGE victims and classic Romero zombies, I'm cool with that.
I think it's pretty clear, however, that in our current consciousness Max Brooks' idea of "zombie" is the prevalent one, since the whole "zombie craze" of the last few years seems to stem from his books which are awesome.