Zombie Siege: I Build a Doomsday Base

All fear comes from not having enough firepower. Luckily, I can increase my firepower without limit. "Apocalypse + rebirth + awakened powers + unlimited supplies + a large cast of male and female characters + building an apocalypse base + defending against zombie and monster attacks" (Enjoy without worry: there's plenty to go around. Build an apocalypse base, upgrade your defenses, and get every kind of weapon you can imagine, from Vulcan Gatling guns and turrets to tanks and planes. Defend against zombie attacks across the globe as the monsters evolve and grow stronger. The further you read, the better it gets.) A zombie crisis breaks out across the Blue Star, turning 90 percent of the world's population into zombies and bringing almost all infrastructure to a halt. In his previous life, Shen Liangchen was an ordinary office worker. When the zombie crisis broke out, food became scarce. He helped others out of kindness, only for them to repay his kindness with betrayal. After being reborn, Shen Liangchen returns to three days before the zombie crisis and unexpectedly awakens the Construction Master System, which lets him create buildings with a thought. The apocalypse reshapes the world's power structure. The factions constantly clash in the open and scheme behind the scenes, all vying to become the new world overlord before the new order takes shape. Amid this chaotic world, Shen Liangchen faces one overwhelming threat after another. In their eyes, only profit matters. If he wants to survive, he can't let others prey on him while he's powerless. So, not only to protect the people he cares about but also to remain undefeated in this chaotic age, he has no choice but to keep growing stronger!