Humanity went under. You go out.
The moon shattered generations ago. The tides broke. The skies ruined themselves and things came out of the dark. What's left of humanity lives sealed inside the silos, and they pay rangers to step back outside. Hauling. Building. Holding the line.
Something else broke that night. The rangers might be the only ones close enough to find out what.
Cargo runs across hostile country in vehicles you don't own yet. Every ranger's destination is posted on the board. See who's heading your way, fall in, run hot together. Convoys form because routes overlap, not because a menu paired you up.
The rig is on loan. Don't lose the rig.
Roads, bridges, shelters, repaired silos. What you build is real and it stays built. The route you laid last month is on the map this month, with somebody else's tire tracks on it. Somebody you'll never meet.
Mutated wildlife. Hostile machines. Weather you can't outrun. Twin-stick combat: tactical when you're stalking a guarded camp, frantic when the canyon turns out to be a nest.
You can run the whole loop alone. You probably shouldn't.