My Doomsday Shelter

[Apocalypse + post-apocalypse + zombies + System + shelter + ruthless, not a saint + power fantasy + building a faction] A meteor crashed onto the surface of Blue Star. A black fog carrying an extraterrestrial virus poured from it and engulfed the planet. Three days later, the fog cleared, leaving countless zombies and mutated beasts in its wake. Humanity's fate was changed forever. Humanity, cast down to the bottom of the social order, struggled to survive in the apocalypse that followed the fog. People fought to stay alive in a desolate wasteland of darkness and despair. Then He Tianxiang, who had accidentally absorbed the meteorite, underwent a strange change. He discovered a program inside his body that could exchange energy crystals for all kinds of advanced supplies... “Zombies? They're just a little extra cash.” “You want weapons? Bring me crystals. Fair prices, no credit.” “You want to get stronger? Sure! Work for me for ten years, and once your contract is up, you'll be one of the strongest people in the world.” “You want to live a carefree life? That depends on what treasures you have that might interest me. If you've got something I like, the doors of my shelter will always be open to you.” But are zombies truly humanity's ultimate enemy? Can people live happily in this world just by wiping them out? Maybe not! Maybe they can't!