Betrayed by his closest family in his past life, Lin Mo was left without a body to bury. Reborn with a System, he swears to make them pay in blood. Lin Mo returns to 30 days before the apocalypse begins and uses his Doomsday Survival System to prepare in advance: renting warehouses, stockpiling supplies, building a fortress, and gathering allies. When zombie hordes sweep across the globe and everyone else struggles to survive among the ruins, his shelter becomes a beacon in the apocalypse. This is a hardcore survival challenge, and a quest to build an empire from the ground up. Revenge, farming, and conquest await in Doomsday Engineering System.