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Flyable Helicopter Rooftop Survival

Also check out:
Cold Stream Flyable Helicopter with mounted miniguns.
The Parish Flyable F-18+Helicopter with miniguns.

This is an ADDON campaign, this is not the original No Mercy campaign with a modded chapter! You will find no changes in the original No Mercy campaign.
You must enter survival mode and find this map under addon campaigns (Flyable Helicopter)


The helicopter arrives to the landing spot upon survival start and waits 35 seconds before automatically flying around on its own.

1- Start survival by pressing E on the radio.
2- Go to the landing area and enter the helicopter.
3- Let the helicopter fly on its own or press E on the flying controls in order to start/stop flying in circles.

The helicopter will loop in two different circle paths around the map and eventually it will go back to the landing zone to stop for a few seconds, and start flying again.
(Warning! Common/special infected can enter the helicopter at this point.)

If you fly too close Tank rocks can hit you and Spitter can throw spits that will stay in the helicopter even if it's moving and incap you.
Smokers can also get you if you get too close especially when the helicopter is heading towards the landing zone to make a stop. Some Jockeys can even jump into the chopper when going too low!


Enjoy!

(To play fair, simply don't stop the chopper and be ready for when it decides to go back to the landing spot. Hundreds of infected will be waiting for you there.)

Flying helicopter taken from this map for Garry's Mod made by Combine:
https://steamcommunity.com/sharedfiles/filedetails/?id=282169017
I only adapted it to Left 4 Dead 2 so it can still be flyable in the original L4D2 No Mercy - Rooftop map.