rager
This special Zombie will dash and charge towards you, so you better be ready to dodge him. The best way to deal with RAGER is to wait until he hits a wall and then shoot him in the back.
vomitron
This is a special Zombie, who is lot tougher than regular Zombies and spits acidic vomit. The best way to deal with this abomination is to hide behind obstacles and to light him up with bullets at the right moments.
panzer
A very well-fortified special Zombie who will steam roll over you if he gets the chance. He has a weak spot on his back, so try to hit him there.
scienfist
Beware of this special Zombie who soaked up too much radiation and will gladly share it with you. Keep your distance and shoot, using melee is not advised!
kamikaze
The only purpose of this special Zombie is to get close to you and explode. Again, melee is not advised!