Imagine you stuck in a town all alone, have nothing to do but then you realize, you are not all alone someone else is also in the town but those someones are not humans they are human eaters they are zombies. Luckily you have a weapon in your hand and have two choices whether to live with zombies and you will feel not alone or kill all zombies but in that case you have to live alone in the town. The choice is yours.
