Legendary soldier Caleb activates a doomsday bunker as disaster hits. He constructs a mechanical farm on Sunset Hills using a welder and a modified harvester. While humanity fights zombies and famine, Caleb eats inside a bulletproof greenhouse. He grows virus-resistant wheat and stockpiles grain. He erects walls and recruits elite survivors. The farm becomes a steel fortress. It features heavy weaponry and Titan mechs.
