Survival in the Fog: Building a Cabin on an Island

The world has been transported to a fog-shrouded realm. Some find themselves in deserts, others on cliffs, all reverting to a primitive existence. Humanity's only recourse is to utilize the current environment to stockpile resources and upgrade their shelters, thus better preparing for the impending extreme weather and unknown terrors…

[Not a Mary Sue story, not a data-driven story, with a slight system, not invincible, and the protagonist's behavior will change over time.]