When Hans Volter is draining the HP from a teammate you have to heal them! If you aren't a medic, run towards them and heal him with your medic syringe!


If a teammate died, than don't pick the weapon up and sell it or play with it if the owner didn't allow it. If he says nothing than just be a good guy and give it back.


Don´t use non-perk weapons as main weapons if you dont have the right perk equipped! if you want to mix your weapon loadout --> Use survivalist.
The medic pistol is the only exception, but only if you have the space left for it.


Never close randomly doors behind you if you pass them, ESPECIALLY in Boss Wave and when the squad is running to the trader.


Don't weld doors randomly and with no sense because they might block you or trap you in a room.
Best combination is support + demolitionist. (Support rebuild the door and demolitionist rearms them). The medic grenades can bypass the doors and start damaging enemies on the other side aswell.


Always have full HP when the new wave starts.


If you have a support-perk in your team then make use of their Ammo backpack ( You can use it at least once per wave!) + at lv20 he can use a skill that givey you +20% Armor!


If you have a demolitionist-perk in your team then make use of their grenade supplies. You can also use it once per wave so why shouldn't you get that one grenade for free?


As a support or demolitionist, access the trader from the edge of the buy zone, so your teammates can acces your supplies. Otherwise when they try to press E to get your supplies, it will open the buymenu.


In the preparation phase for the Boss wave, spend all the dosh how you want. But If you have some dosh left, DROP it for your teammates! To drop press --> B


Always stay together! It is the key to win, especially at suicidal and hell on earth!
The medic is able to heal better and you can save each other.


Don't join a hard difficulty with a lowlevel perk.
Recommended suicidal: perk lv 15-20.
Recommended hell on earth: perk lv 20-25.


Communication is very important aswell. Always give callouts when you see giant zeds. Don't remain silent.


ALWAYS kill big zeds with your group. Don't rage them If nobody is ready to fight them. Also If you are getting chased by big zeds, stay with your group and don't run away, so they can help you taking them out.


When you medic syringe is ready and you ont need it currently, use it to heal teammates. It will gain you dosh and experience.


If you are playing as the medic, your Job is to keep teamates alive. Keep your eyes on others and make sure everyone is at full HP, before you start to kill zeds.

And I am not a native english speaker... so If you found a typo or grammatic mistake please let me know.