The Walking Dead Survival Instinct: Walker Execution Pack DLC - PS3 [Digital Code] Downloadable content for base game: The Walking Dead Survival Instinct 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? Download size for your PlayStation device: 241Kb