You canâ€™t afford to rest! The Walking Dead: Survival Instinct players will have access to the Herd Mode, see how long you can survive against endless waves of walkers. In addition, fight off walkers in the story mode with a new arsenal of melee weapons including a survival knife, sawtoothed machete, kukri, reinforced hatchet, and advanced machete. How many frenzied flesh-eaters can you survive against before joining their ranks? Note: A New Game must be started to access the extra weapons.