Discover new uncharted biomes: the arching expanses of the twisty bridges, the glittering mammoth crystals in the Crystal Caverns, explore above the water on the snow-covered peaks and icy caves in the glacial basin, and many more new environments for you to discover. Discover what happened to your sister, the Alterra expedition team, and solve the mystery of the aliens that came before. Subnautica below zero has a smaller scope than the first game but introduces a new storyline and scripted sequences making it a more linear experience but combined with the free form discovery the first game is known for. Subnautica: below zero is the sequel to the beloved survival game Subnautica, return to the watery planet 4546B but this time in an expedition to the planet’s sub-zero arctic region, survive using only your wits and some survival equipment, and uncover the mystery of the missing expedition.