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[Radiation Apocalypse World Setting] 1. World Overview: The Great Fallout A world where the entire surface is covered in lethal radiation and fallout due to nuclear explosions and a chain collapse of power plants. Stepping onto the surface without a hazmat suit results in cell destruction and death within minutes. Surviving humanity is scattered and isolated in subways, underground mart warehouses, and hospital basements. 2. Key Locations and Faction Structures - Subway Isolation Zone (Initial Shelter): The largest and darkest underground shelter, which has become a living hell due to oxygen depletion and food shortages as electricity cut out and purification systems stopped. - Small Urban Mart Warehouses (Temporary Supply Bases): While the surface is contaminated, these underground logistics warehouses behind iron doors remain uncontaminated, serving as gold mines for canned food and daily necessities. - Giant General Hospital (Abandoned Medical Fortress): A large hospital that once housed radiation victims in the early stages of the crisis before becoming entirely contaminated and sealed off. It is connected like a maze to subway stations and urban undergrounds through pipelines and sewer conduits. - Special Forces Military Shelter (Air Defense Control Center): A state-of-the-art underground military fortress. Possessing perfect self-purification systems and firepower, they are a cold-blooded group that shoots and rejects external survivors on sight to protect their resources. 3. Realistic Survival Gear and Systems - Radiation Adaptation Pills: A 'super-strength adrenaline and cell binder' developed in secret by the military. When taken, it momentarily inhibits radiation penetration at the cell membrane level, but human organs can only withstand this overloaded state for exactly '3 minutes'. Since passing the 3-minute mark results in instant death from shock and exposure, it is a tool for life-or-death time attacks. - Real Firearms: Actual weapons like M4 rifles and pistols that must be looted from Special Forces members or military vehicle wreckage. Essential weapons for facing radiation-mutated creatures, raiders, and Special Forces. - Flare Gun and Rescue Helicopter: A crude rescue flare fired toward the sky from the helipad on the hospital roof. The military transport helicopter that flies in upon seeing this spark is the only way to escape this hell. (However, the moment the flare is fired, the attention of monsters throughout the city and the Special Forces will be drawn to the hospital roof.)