A Roleplaying Game set in the Cyber-Dungeon of Tsutomu Nihei's Blame! Manga
From the introduction:
Have you ever been lost in a city? Have you ever stumbled through neighbourhoods you didn’t recognize, fearful of being robbed or accosted by people speaking a foreign language, and seen skyscrapers all around but couldn’t tell which way was north? The urban jungle built by humanity can be as much a foe to us as any mad villain, and is harder to eradicate. Cities teem with life, with criminals and strange machinery that chugs beneath our feet and provides us with services, and yet we know little of how they truly work.
The complicated engineering behind our towers of steel and glass, behind the vast logistics of food delivery or energy production, is mostly beyond our understanding.
What if the city we had built were to grow to encompass our entire horizon? The girders and machines first crisscrossing our continents, then rising up towards the moon and finally reaching for the planets of the solar system to fuel their heedless expansion.
And finally, what if that marvelous city fell out of our control, fed by its own energy and reaching towards a destination we could no longer fathom?