The objective is to find your wife and save her, you must look through buildings, talk to people, and collect clues to her whereabouts. You will also be given other tasks by human characters that will be necessary for you to move to different parts of the city. You journal keep track of your task list. You can pick up objects, anything from weapons to food, and store them in your backpack. You can access your backpack whenever you need to to equip yourself with different weapons, dress in different clothing, eat, read a survival book, take pain pills, and access other objects you have collected. Don't linger anywhere too long, more and more zombies will find and attack you. Also, different parts of the city are more infested than others.