Building a Super Shelter Starting from Recording the Apocalypse

While other survivors were fighting for half a bag of biscuits, Lin Ye hid in an old apartment on the twelfth floor, recording the hell outside the window on his laptop: hordes of zombies, terrifying mutants, and crazy humanity. [The event "The Predator Appears for the First Time" has been completely recorded] [Evaluation level: Important (blue)] [Obtain: Blue Source Crystal × 1] [Unlock transformation options: strengthened security door/basic observation deck] ... Record the zombie siege → Unlock [Smart Ballista Array] [Biological Sensor Mine] Record the acid rain disaster → Unlock [Full Environmental Filtration System] [Corrosion Resistant Outer Layer] In the wasteland world, automatic sentry towers and ecological farms have sprung up. ... My name is Lin Ye. When you see this document, the apocalypse has ended. Welcome to my super shelter.