Extreme Cold Doomsday: My Fortress Unlimited Upgrades

The world is suddenly freezing at night, with temperatures plummeting to hundreds of degrees below zero, and the frozen apocalypse is coming. Order has collapsed, resources have been exhausted, human nature has been completely distorted in the extreme cold, predators are rampant, and extreme natural disasters are approaching step by step. Lin Ce, the former chief mechanical engineer of the National Polar Science Expedition, was betrayed by his teammates and abandoned on the ice field. When he was about to die, he bound the [Polar Fire Fortress System] and activated his exclusive mobile fortress. From the initial polar icebreaker, to the all-terrain steel fortress, to the amphibious under-ice fortress, and the constant-core expedition ship, his mobile fortress has unlimited upgrades! Tear betrayers to pieces, crush plunderers, break into the restricted area of ​​​​the ice field, break the blockade of forces, and build a safe house for survivors in the frozen wasteland. As the local core cools and the solar system falls into a dark matter cold spot, Lin Ze drives the stellar fire mothership and becomes the last hope of human civilization.