Runway Finale

The Runway Finale is the fifth and final chapter of the third campaign, Dead Air.

The survivors reach the airport runway in time to see a jet air-liner (presumably with its passengers all infected) crash. They then make their way towards a military plane on the runway and establish radio contact with the pilot.

The ground team of the airport seem to all be dead or infected - the Pilot informs the survivors that the plane is in desperate need of refueling. After opening a valve on a connected fuel tanker, the plane beings to re-fuel and the pilot gives the group notification as the tank begins to fill.

The survivors must hold out until the plane is air-worthy against waves of common Infected, several  Tanks and other  Special Infected. A minigun turret helps in this regard.

Eventually, the plane is filled with fuel, the engine starts, and the survivors must board the plane from the opened hatch at the rear, evading a final rush of Infected. Success grants a view of the plane's successful departure, followed by the display of the campaign credits.

Tactic 1
There is a small closet in the building to the far left of the minigun (if you are manning it). If possible, have two people armed with pipe bombs, and two with molotovs. When the fuel is started, have everyone hide in the closet, with the people in front crouching so the people behind can shoot over them easily. The closet will funnel the infected and make it easy to mow them down, and make it hard for special infected to get to the survivors. If someone is grabbed by a smoker, melee them immediately so they do not get pulled from the closet. Use a pipe bomb if the horde starts to overwhelm the survivors. When the pilot announces the plane is half-full, exit the closet and prepare to face a tank. If you have molotovs, light the tank on fire, and then just run from it until it burns to death. Use this time to also restock on ammo, grenades, and health if need be. Once the tank is dead, get back into the closet and fight off the common infected until the pilot announces the plane is almost full. Exit the closet again for the 2nd tank fight; burn it to death if possible. Once the tank is dead, get to the back of the plane and hold off the infected until the ramp is lowered.

Tactic 2
There is another airport device similar to the one the survivors enter the level one with that has an access ladder. The survivors can camp this terminal, funneling the undead. When a tank comes, the survivors need to jump on to an aircrafts wing on their right and follow it into open ground, where the tank can be more easily dealt with. Rinse and repeat. Note: there are a number of walls on the terminal which can be broken by any infected as well as the hunting rifle.

Tactic 3
Another uncommon method is to get all four survivors to stand out in the open space at the back of the map where the "Do not cross" tape is. There are 4 points from which hordes will come from: One on the left behind the tape, two directly ahead around the fueling plane and one to the right of the truck (sometimes filled with gas canisters). The team should camp here until it is time for the Tank to appear and then circle around the fueling plane to avoid the Tank's rock throws, though this method is more effective with a Molotov it also works well using only weapons to defeat the Tank.