Possible salvation lies beyond those walls—behind those bars that may provide relief from the nightmare the world has become. Your mind races with thoughts of peaceful nights, protective walls, and a fresh start. This could be home. But who knows what lies within… Killer Within is a deadly expansion to The Walking Dead: No Sanctuary, giving survivors the keys to the iconic prison featured in season three of AMC’s The Walking Dead television show. Included in Killer Within are even more challenging scenarios, pitting survivors against new armored walkers, crumbling fortifications, a deadly plague, and dangerous new neighbors!