Deep in the tunnels of Moscow's Metro, a mother tells her child that life wasn't always confined to an endless stretch of cement and darkness. People used to live on the surface. But you've just come back from that place; beneath ever-present clouds sits the empty husk of a decimated civilization, every inch of which is enveloped in radiation. If that doesn't kill you, the mutants probably will. The world above is terrifying, but the sad truth is it's not much worse than life below. Warring political factions have splintered what remains of the human race. Mankind may have survived a nuclear holocaust, but it's trying its damnedest to snuff itself out.