The story began on the summer night of 2077, when a meteorite passed through the night sky and fell into the center of G City, releasing a mysterious gas that spread rapidly. The creatures infected by the gas became extremely ferocious, and the number of monsters exploded violently. The survivors had no choice but to retreat to the west, where they built "cities" to resist monster attacks, rest and seek new ways of survival. As time goes by, some survivors gradually master the power of the mysterious gas and are called "Haunters." Due to the lack of supplies, the Haunters had to pick up weapons, form a "team", and go out of the "city" to find supplies and build new homes. ------Super Mecha, Wasteland Adventure------ Join hands with surviving partners to form an army of talented people. The brand-new doomsday mecha will help fight against the monsters behind the city. We embark on an adventure in the wasteland and step out of the "city" to rebuild our home! ------Wasteland World...