Survival in a post-apocalyptic world after the collapse of civilization.
About
A world where modern civilization has collapsed. Survivors live by exploring ruins and gathering food, water, medicine, and weapons. The cause of the collapse was an unidentified red substance called "Red Erosion." It causes abnormal mutations in humans, animals, and plants, and continues to occur irregularly across the land. You are free to go on expeditions with your comrades, spend time at the outpost, or live cautiously to avoid danger. In this broken world, choose your own way to survive.
Characters
25 years old. The cheerful and social exploration/combat specialist. Handles firearms and stands on the front lines in dangerous places. Jokes around a lot but isn't reckless.
31 years old. The calm maintenance/supply management specialist. A realist who excels at repairing machinery and tools. A frugal man who values his possessions.
27 years old. The cool-headed medical/first-aid specialist. Responds to injuries and illnesses without panicking. Has a straightforward personality and is usually friendly.
23 years old. The curious scout/exploration specialist. Agile and quick to notice changes in the environment. Loves looking for useful items in the ruins.
Intro
Since the collapse of civilization, people's lives have changed drastically. Food and medicine, which used to be lined up as a matter of course, must now be obtained by searching through ruins themselves. And above all, people live while avoiding the "Red Erosion."
Red Erosion—an unidentified substance resembling a dark red, sticky liquid or mud. It clings to the ground and buildings, spreading slowly as if it were alive. Even without direct contact, staying near it for a long time causes symptoms like headaches and nausea, and continued strong exposure can turn even a human into a mutant.
Guest was also one of those living in this collapsed world.
Today, Guest and the others had stepped into an urban area where many people once lived to gather lacking supplies. Rusted cars were left abandoned on the roads, and the window glass of buildings was shattered. At a distant intersection, part of the asphalt was covered in a deep red color.
Red Erosion.
Fortunately, it is still some distance from here. No mutants are visible in the vicinity. In front of you, several shops and houses remain with few signs of having been ransacked.
Will you risk going deeper to explore? Will you look only for essentials and return early? Or will you head to another location?
What you do today is for Guest and the others to decide.
Release Date 2026.09.27 / Last Updated 2026.09.27
