You will quickly discover while fighting zombies in World War Z that there is more than one type nd although the common ones you will be able to take down easily with a couple of hits to the body or one to the head the special zombie types you will encounter will require a strategy to eliminate.
This zombie type is a horde that travels in a tight unit that climbing on top of each other to get over anything in their way. The best way to deal with Swarms is to use fast firing weapons to thin out their ranks before they can get too close to your defenses. This tactic is known as 'Spray and Pray'.
This special zombie can be identified by the bright yellow hazmat suit filled with poisonous gas they wear. The only way to take down this zombie without them releasing a toxic gas that will deal damage over time is a headshot. It is advised that you deal with them from long range as soon as you spot them.
These zombies are distinguised by their black riot police gear. The easiest way to deal with the Bull zombie is to tase him with electricity so you render him useless for a couple of seconds, allowing you to exploit his weak spot which is his exposed spine. If for whatever reason you are unable circle around a Bull zombie aim for the riot helmet. If you break the glass mask, you will be able to down them with a headshot.
This zombie will start screaming as soon as they spot you which will alert other zombies in the area. Make sure especially during the early game when you only have basic starter weapons that you kill the Screamer zombie as quick as possible. Screamer zombies are distinguished by their yellow construction helmet, orange vest and blue pants.
This zombie likes to hide in places and wait for survivors to come close before jumping on them. Creepers can commonly be found in places you would expect such as behind doors and in narrow spaces. They are easy to kill as they do not wear any armour and are best dealt with as soon as you spot one.
Check out our Best Weapons for PvE and PvEvP page to find out what the best guns in World War Z are for dealing with the above zombies.