A few days ago, I thought of a concept for a new Subnautica game. (you can find that here) It was called "Subnautica: Thalassophobia Edition" and is basically a scary version of the main game, with a different story.
Here, I wanted to think of some story ideas and fauna/flora, and stuff like that to expand on this.
First idea: permanent hardcore mode (unless you choose creative)
Comment your ideas: