CampZ

Build by day. Hold by night.

The dead come at night. The sun runs them off. Your job is to still be here in the morning.

Walk Sam around a clearing off the old highway, haul scrap and food, and raise tents, gardens, sawmills and watchtowers. When the sun goes down the horde comes up the road, and everything you built by day has to hold until dawn. One thumb, short sessions, a camp that keeps working while you're away.