Zombies are scary because their presence in numbers means that you, individually, are alone. Everyone else is dead. Not only are they dead, they’re now monsters trying to kill you. A zombie is existentially scary because it is everything good about humanity removed from a human shell, and it reminds us of what we could be. And like most good monsters, the idea of indoctrination is present. I know our lore here is different, but normally a single bite can turn YOU into THEM. Here, it’s even worse. It doesn’t even have to be the zombies that killed you, just dying makes you a candidate for reanimation, and makes you another face in the hoard.
What makes zombies scary isn’t their combat potential, or their bloodstained and familiar faces, or even their numbers. It’s the inevitability. EVERY good zombie movie ends with the main characters dying. Why? Because it’s the inevitability of death at the hands of a mindless other that scares us. There is no negotiation, no diplomacy, and eventually your defenses and willpower will be worn away. You will die, and that’s it.
That’s why I don’t think the game should have explicit win states. Because survival can only last for so long, and that’s horrifying.