Inhabitants of the abandoned city. He likes privacy, cuts off from the outside world, finds things he can find from above, and comes down to live here.
I created an old, neglected train station and then designed it into a secure place. The stairs way is blocked with a steel frame to protect them from intruders. I put details on the wall and the floor tiles to make them look broken and abandoned, made it look more realistic with old movie posters like what usual train stations would have.
On the platform and the railway are used to store supplies. On the right side of the railway, it also has barriers to refrain of intruders.