The Edge of Darkness

Nuclear war, tsunamis, earthquakes, volcanic eruptions, acid rain, and plagues struck one after another.

Two-thirds of the world's population died in the disasters. But just as people prepared to heal the wounds they had left behind, they discovered that Earth had become utterly unrecognizable: poisonous plants that grew at astonishing speed, enormous beasts with increased intelligence, and insects more resilient than ever that spread disease… Nothing was like the Earth we knew. People built towering walls, and could move about freely only within them…

Of course, in every age there are people who brave danger in pursuit of wealth and survival. A chaotic society is fertile ground for them. From simple treasure-hunting jobs to illegal assassinations, or… well, all kinds of temporary work, if the client is willing to hire them. If there's money in it, they'll do just about anything. They are [Bounty Hunters].