Pancontinental Chronicle: Ruins Train Number

I constructed a grand worldview from my various fantasies, and then cut this paragraph from the main frame as the starting point. The overall worldview spans a wide range of time and space, and cannot be explained clearly by one or two works, so please pay attention to the follow-up. This work is set in the "Era of Madness" and can be understood as a biohazard in a fantasy world. The survivors huddle in the city fortress and linger, and a few people will choose to leave the fortress and explore the outside world. Of course, pioneering is an extremely dangerous thing. When a base area is breached, it is crucial to rescue the survivors back to the fortress. The protagonist of this game is the rescue team responsible for rescuing survivors, and their battleship is named - Ruin Train.