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
The Special Infected were the Boomer, Smoker, Hunter, Tank, and the Witch. The Common Infected are everyone but the Four Survivors.
left 4 dead 2 you get more guns another handgun called a Magnum and more melee weapons and more maps and new special infected
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.