Has bathophobia, played subnautica.

Jumped out of my skin multiple times from the sound effects and fear that something would come out of the dark and eat me.

Explored around the place. Saw a mountain. Land ho! Explored land. Returned to life pod laden with goodies. Randomly turn around to pick up some loot and saw in the distance I was being chased by the biggest monster currently in the game.

Did not poo myself.

Thoroughly recommended if you are afraid of the following:
Deep, open water.
Sharks
Giant Squid
Sea monsters in general tbh.

Bonus to aid terror level:
Having an overactive imagination.