Author: Markus Niklasson (
https://www.gamemaps.com/search?q=Markus%20Niklasson )
The survivors fight their way through the woods and up alongside the river and discover a trainwreck. This leads them to a remote trainstation where their only hope for survival could possibly awaits.
The 4 campaign has L4D1 survivors and defending a vehicle while riding in it.
