Not counting Tanks or Witches, I believe that the Jockey is the most dangerous new special infected. This is because not only can they drive a Survivor away from the others, but if the other survivors are non-A.I. (and horrible shots) you can steer them away from where they need to go.
there is no fast zombie in left 4 dead...there is however a fast special infected. The hunter is without a dout the fastest special infected in left 4 dead.
cancer
TANK
left 4 dead 2 you get more guns another handgun called a Magnum and more melee weapons and more maps and new special infected
The Special Infected were the Boomer, Smoker, Hunter, Tank, and the Witch. The Common Infected are everyone but the Four Survivors.
Yes, Left 4 Dead "Smoker" special Infected do shoot their long tongues at players.
Yes it does you can as 1 of the 4 survivors or switch between special infected on the infected team
sv_cheats 1z_spawnz_spawn witchz_spawn (special infected name)
Its a special infected that can charge at survivors, pick them up, carry them to a wall, then start pounding them. It is probably also the sturdiest Special infected outside of the tank.
You can't become a zombie, but you can play on versus and become a special infected.
The ones with special capabilities that are different from regular zombies: SMOKER:Tongue Puller BOOMER:Vomiter WITCH:Cry baby HUNTER:Jumper TANK:Muscle man Hope this helps
Unless you mean the level special infected (Swampy mudmen, Hazmat zombies) No the commo infected do nothing but swarm and damage you a little. But there are special infected that spawn specific to the campaign your doing. Look them up if that's what you mean.