In the post-apocalyptic world it is not so easy as it might seem. Especially when you are attacking from all sides hungry critters, and your only chance of survival - it is a battle that will show everyone who is worthy of life. Beware of bites of certain species of zombies, because they can infect you with poison, and you will have to buy expensive first-aid kit, so as not to turn into one of them or do not die from blood loss.