Sci-fi RPG

This is a detailed and realistic world of a sort of dystopian. After a mass nuclear war nearly a century ago, the global surfaces were abandoned by the human race. Either killed or sent into underground refuge. The plan was to build walls rising from utility tunnels to mark 'no striking' zones. When the backfired, cities were forced in-ground. There were shielded by these deep driven walls and vast tunnel systems. All live under one giant cement dome and one control room.

The main cities are the following;

Ishikari, a simple rooftop town sometimes considered the slums. Overhangs of tin and parapets are compacted together in narrow streets beneath. There's little plant life with lack of artificial sunlight and smaller population. This is between the Exclusion Zone and entrance to FOPC (Facility Of Prefecture Correction.)

Lamaris, a more modernized city that's not all that big. Holograms everywhere, neon lights, top food chains and clubs. Home to the heaviest security drones and only working factory. Behind the city center is dark alleys and not-so-cheap motel rooms. The city is closest to the control room, and transit way.

Ebora, a hidden community in the sewage/tunnel systems, are urban legends said to be nomadic and cannibalistic from disease that wreaks havoc in the tunnels. Before a cave in of the first built maintenance tunnels, grew a giant tree large enough to protect a small village in its scaffolded branches. They have no way of communication unless taken by sewer ways.

Some cities are abandoned, left behind before even being built fully or released to public. Inhabitant areas grow an airborne disease taking form of red fog. Among it grows biological life forms that infest flesh bodies. They're tellable like dark spots in surrounding street-lit cities.

Before the government disappeared, a correctional facility was input between Ishikari and Ebora's tunnel system. It's now rumored to be haunted by the inmates and patients that never were cured for free. It's shaped as a prison and hospital building all-together. FOPC is now walled off in order to keep out any airborne disease.