Left 4 Dead/Farmhouse Finale

You've crossed the bridge, and just need to get to the farmhouse for evacuation. Apparantly, it's been overrun.

BTW, if you have a cellphone, another survivor believes you could use it to call for help.

Route

 * Exit the safehouse, and head down the tracks. At the end, climb the ladder on the train car.
 * You should see signs that you are entering a US Military evacuation zone. It's overrun however.
 * Advance through the path, and you'll reach a cornfield. Visibility in this region is extremely poor.
 * You'll disturb a murder of crows, their panic attracts the horde.
 * Walk forward through the cornfield, and you should see a small clearing - this is a tractor. If it's quiet, climb through a hole in the fence near the tractor and turn to the left slightly - the house is straight ahead.
 * Otherwise, Continue going forward, and you should see a hay pile, and should hear the radio in the distance. Turn right at this point.


 * Head to the building labeled Evacuation outpost echo.
 * Radio for help when you are ready. Note that tanks can smash the walls of your farmhouse.
 * The APC arrives, and parks near the front of the building.


 * There are a total of three guaranteed tanks in the final battle. Unlike the other campaigns, you do not get an ETA and thus can't tell when these tanks arrive. These tanks arrive in separate waves, with the third attacking after the APC arrives.