If you do not pick up a survivor you cannot craft and heal in between levels. When you pick up a survivor, it allows you to heal and craft items in the car.

Also to speed up the gameplay, you're welcome to skip the car rides in between levels. For the achievements, I'll list the related achievement at the end of the level with the respective survivor, however you will NOT unlock any achievements until you beat all 11 levels. Even though you don't need to do much scavenging, I'll make note of things I interacted with that are not out of the way. As with the main game portion, this will contain a video walkthrough portion and a text walkthrough portion.

So if you already have the survivor on a specific level, ignore that part of the walkthrough. You cannot get them all in one playthrough, you need to do it one at a time. The way I am going to structure this is that I'm going to write out each level and tell you the most efficient way to get the water, gas, and food, plus the location of each survivor along with their names. Instead of going through the whole level to get a blocker code, you simply need to find water, gas, and food. This is very different than the main game. Now we get to the good stuff, the story playthough. DLC: The Only Traitor - Story Playthrough

Download the only traitor