Just imagine: you were flying through space and suddenly your rocket crashed on a strange planet. Moreover, the whole surface of this planet is covered with one big ocean and your spaceship literally fell to its bottom. Now you have to venture out in your oxygen suit and explore the underwater landscape in search of various resources and materials that you can use to survive in these harsh conditions. Local flora and fauna aren’t always friendly to earthlings, so you need to be very careful. Play Subnautica online with other survivors and see who builds the best underwater base!