Monster Calamity? This Lord Only Wants to Build Up Defenses

[Apocalyptic crisis + base-building and development + stacking military defenses + taming Titan beasts] Territory progression: little shack → villa owner → manor lord → fortress king → city ruler → star lord → cosmic overlord → ruler of the multiverse → break out of the box and kill the author Have you seen A Quiet Place? It features monsters called Listeners that hunt by sound. This time, they've come to Blue Star. Make any sound louder than a whisper in your ear, and monsters thousands of meters away will hear it, then race over walls and rooftops for several kilometers to harvest you within half a minute! Their forelimbs are so sharp they can tear through twenty-centimeter-thick solid metal walls in an instant. No defensive structure can withstand a direct assault. Humanity's weapons systems are wiped out in an instant, forcing people to hide underground as their situation grows increasingly dire! In his previous life, Lin Chi was killed by the Listeners. After being reborn, he gains the Fortress Defense System. As long as he stays holed up in his territory and keeps raising its defense rating, he can unlock all kinds of defensive structures! Spike traps! Rapid-fire drones! Automated turrets! Photon towers! Jaeger mechs! Eternal energy cores! Mother ships of god-tier cosmic civilizations! Causality weapons! He turns the land around his home into an invincible territory, absolutely safe from harm. He builds a hundred underground floors of facilities, gathers all kinds of servants, and houses researchers. He builds a thousand-floor underground dungeon to imprison Listeners! Xenomorphs! He tames Titan beasts and conquers city after city! As more monsters invade, Lin Chi cuts a path through them, expanding his domain ever farther! “Sorry, my defenses will always be one step ahead of yours.”