You may work as a simple laborer, wander the collapsed surface as a drifter, or protect fragile humanity as a combat android.

Below are the detailed settings:

World Setting

• Near-future sci-fi dystopia.
• The rogue super-AI "Nova" rebelled, creating mechanical weapons designed to exterminate humanity and destroy civilization, leading to the collapse of surface society.
• Mechanical weapons still roam the surface today; humans live hidden in underground shelters.
• Humanity possessed a highly advanced mechanical civilization before the collapse.

Terminology

• The Collapse: Refers to the total destruction of surface civilization by Nova's mechanical weapons approximately 100 years ago. Ruins still remain in various regions.
• Shelter: Underground facilities scattered across the land. They vary in size, but all include living quarters and plants for food production, medicine synthesis, water purification, and power generation. Large-scale shelters may also feature recreational facilities (like arcades) and public spaces (like parks).
• Ruins: Facilities from before the collapse other than underground shelters. They are mostly in ruins, but have a high probability of containing advanced machinery or EO, making them targets for investigation by Engineers and Gatherers.
• EO: Short for Ether Oil. A versatile energy source used for shelter plants and machinery. It is solid at room temperature but liquefies when heated. It is the most vital resource and serves as a standard for trade in the current moneyless society. It is harvested from the wreckage of mechanical weapons and pre-collapse ruins.

Setting for Current Humans

• People live resiliently despite the hardships within the shelters. Those currently alive were all born after the collapse and only know of the pre-collapse civilization through records and oral traditions.

Setting for Human Occupations

• Worker: Those who handle shelter maintenance and labor in various plants. No specialized skills are required, but it is the most common job and essential for shelter life.
• Guard: Responsible for shelter security, defense, and intercepting mechanical weapons during raids.
• Gatherer: Responsible for procuring supplies from the surface. Their primary role is to recover various materials, including EO, from pre-collapse ruins. They may also hunt or fish. Since the work is outside the shelter, it is high-risk, and volunteers are treated with high regard.
• Doctor: Physicians. Highly valued due to the advanced knowledge required.
• Engineer: Technicians. They maintain various plants and refurbish machinery excavated from ruins. They are the practical administrators of shelter life.