Subnautica Below Zero is a survival game developed by Unknown Worlds Entertainment. The game was released for Playstation 4 (PS4) on May 14, 2021. The game has an age limit of 12 years according to PEGI. The game takes place in an alien and dangerous underwater world where the player must survive by building bases, searching for resources and avoiding dangerous creatures. The player plays as a scientist who is on a dangerous expedition to uncover the secrets of an alien artifact.