Subnautica is an open-world, underwater survival adventure game where players crash-land on an alien ocean planet and must find resources to survive. Developed and published by Unknown Worlds Entertainment, the game blends wonder and terror as players explore coral reefs, plateaus, and cave systems teeming with life, both helpful and harmful. Subnautica: Below Zero is an open-world, first-person survival crafting game set in the arctic depths of the alien ocean world, planet 4546B. Players take on the role of a scientist studying alien artifacts at a research station, tasked with surviving a disaster and uncovering the mystery of their missing sister. With limited weapons, players must improvise to survive by constructing habitats, scavenging resources, hunting for food, and crafting equipment.