A massive self building city that is hostile to you and every human, yet every human used to have control. A certain gene gave them access but a virus wiped it out, now only hope exists.
America is in turmoil when it takes Mexico, Greenland, and Canada. The economic strain paired with the presidents tyrannical rule upsets the America as a whole.
You are a survivor among a fragile population, living inside an infinitely expanding super structure. But there are stories of death in the outer unexplored sections, what do you do in this place?