Apocalypse Game: My Shelter Can Upgrade Without Limits

80 billion people are transported to Xonos to take part in the Apocalypse Game, where extreme climates and scarce resources bring out the cruelest sides of humanity. In his past life, Leo Quill was betrayed and killed. After being reborn, he awakens the "Resource Multiplier System." He stockpiles endlessly and upgrades a hidden shelter into a fortress. From there, Leo grows stronger in every way and begins his legendary conquest of the apocalypse.