We'll have a guide for the survivors released quickly, going a lot more in depth with this, so we'll adhere to the basic things today. The important things is that each of the survivors in the game have various strengths and weak points and as an outcome some are much better than others. Selecting the finest for the task (and based on your play design) is necessary if you desire to have a simpler trip along. You just have 3 survivors to select from when you initially start the game (the rest being unlockable by finishing achievements, while some through IAPs just). Out of these 3, I suggest using Irma and Olaf (he's outstanding at refueling generators and fires-- so ensure you constantly use him to do this).