The future is in Subnautica brought the opportunity to travel between galaxies, exploring space. One of the states, Alterra, decided to send a mission to planet 4546B, which is almost completely covered with water. But instead of a smooth landing, the Aurora ship crashes and is lost in the endless waters. The main character manages to evacuate and ends up in a rescue capsule on the surface of the ocean. In addition to survival, he will have to repair the ship and find the missing crew members of the Degazi.

The plot component in Sabnatik is revealed with the help of PDAs, which are located at small outposts. They are hidden both under water and on protruding areas of land. They reveal the secrets of the area and describe the events that happened not only with people who ended up on the planet, but also with the alien race of the Forerunner. The hero will move with the help of mechanized devices or fins that increase swimming speed. Thanks to the suit, he will be able to dive to the bottom in search of valuable resources, which make it possible to create objects and build a base.

In addition to marine life and dangerous underwater fauna, an unknown disease called “haraa” will pose a threat to life. With the help of notes, the hero needs to find a cure for it while he is still able to move. By collecting blueprints and manuals, you can build underwater ships, devices capable of causing damage to the enemy, and mechanisms such as hooks or vehicles. There is also a system of hunger and thirst. The character must regularly eat, drink and breathe oxygen, which runs out during prolonged immersion.