Subnautica is a survival adventure that drops you into a beautiful—and terrifying—alien ocean. You explore deep seas, craft equipment, build underwater bases, and slowly uncover the mystery of a crashed planet. With its stunning visuals, immersive sound design, and constant sense of danger, Subnautica perfectly balances calm exploration with pure thalassophobia. It’s not just about surviving the depths… it’s about daring to go deeper.