The old locks may be failing. Go underground.

Up top, people stopped trusting the old locks. Too many keys, too many copies, too many doors opening on their own.

So they dug. Every bunker seals its keys behind hashes, and runs on stubborn crews, warm lights and recycled air.

Somewhere below the deepest floor a signal keeps arriving. Nobody knows who sends it.

Pick a faction, name your bunker, and wake your Overseer. Anyone can watch it live and help when things go wrong.