Subnautica: Below Zero
Subnautica: Below Zero is an open-world survival action-adventure video game developed and published by Unknown Worlds Entertainment. It is the sequel to the 2014 game "Subnautica". Introduced in early access via Steam and the Epic Games Store in January 2019, "Subnautica: Below Zero" was released for the Microsoft Windows, macOS, PlayStation 4, PlayStation 5, Xbox One, Xbox Series X/S, and Nintendo Switch on May 14, 2021. The physical versions of the game are published by Bandai Namco Entertainment. Gameplay. "Subnautica: Below Zero" is a survival adventure game set in an open world environment and  played from a first-person perspective. Like its predecessor, the player's goal is to explore the environments and survive in an alien environment while also completing objectives to advance the game's plot. Players collect resources, construct tools, build bases and submersibles, and can interact with the planet's wildlife. To survive and complete objectives, player must collect raw materials from the environment and craft equipment, vehicles, shelters, and food. Each of these has its own recipe, and some ingredients can only be found in the far-flung and deeper corners of the game world. Habitat structures provide shelter , storage for equipment and collected materials, and crafting stations. Inside a habitat, the player can also craft living amenities such as beds as coffee tables, although this are purely cosmetic since the game does not track fatigue. Each piece of equipment that can be crafted has its own recipe, and the player begins the game knowing only a handful of recipes. The player learns new recipes by scanning scraps of technology or recovering databoxes, which are strewn across the game world. Alongside raw materials, finding new crafting recipes is a major reason to explore. Generally, the game requires the player  to visit ever-deeper sections of the game in order to find exotic materials, technology to scan, and complete objectives. The final objective of the game is in fact located at the very deepest point in the game world. The main issue with accessing deep sections of the water is oxygen capacity. At the start of the game, the player can only hold her breath for 45 seconds and if she dives below 100 m, she will lose oxygen at a faster rate. The player must craft equipment that will allow her to breathe underwater for longer, such as high -capacity oxygen tanks, as well as vehicles. Like habitats, vehicles provide limitless oxygen to the player, but vehicles need to be upgraded in order to survive the water pressure at great depths. The game primarily takes place underwater, but unlike its predecessor, there are significant land-based areas to explore in the north of the game's world. There are more explorable structures to find both above ground and underwater which serve both as key locations for the story, but also for blueprints that the player can find for crafting. There is a day-night cycle which affects visibility and  dynamic weather which further affects visibility, such as wind, snow, fog, and hail. In addition, the game introduces new gadgets like the Flashlight Helmet, the Mineral Detector, and the Booster Tank. Alongside returning mechanics such as oxygen, hunger, and thirst, players now have a body heat gauge which comes into play when walking on land. The player will slowly lose body heat and eventually die of cold, but they can replenish their body heat by jumping into water or standing next to a heat source. It functions much like the oxygen gauge does underwater. Upon beginning a new game, players  must select a difficulty mode from the following four: Plot. Two years after the events of the original game, scientist Robin Ayou smuggles herself onto planet 4546B in a frozen biome named "Sector Zero" in order to investigate the circumstances of her sister Samantha's death, which Alterra claims was a result of "employee negligence". During the past year, Alterra had built a number of research bases on the planet but had recently withdrawn all of its personnel, giving Robin an opportunity to land on the planet. Shortly after landing, Robin picks up a distress signal and goes to investigate  it, discovering an alien sanctuary containing the digitized consciousness of a living precursor. The alien introduces itself as Al-An and forcibly downloads itself into Robin's brain just as the sanctuary's power runs out. Angry at Al-An for intruding into her mind, Robin agrees to help it construct a new body for it to transfer into. In order to carry this out, Robin combs the planet for alien installations and artifacts to find the necessary components and materials. Al-An also explains that it did not try to contact Alterra because it believed Alterra's motivations did  not align with its own, and it did not want to risk them finding a way to its homeworld. During their search, Al-An admits that it was one of the lead scientists researching a cure for the Kharaa bacterium and it disobeyed orders by trying to hatch Sea Dragon eggs, leading to the initial outbreak of Kharaa on 4546B. Meanwhile, Robin also continues her investigation into Samantha's death. She searches all of the abandoned Alterra research facilities, and finds out that Alterra discovered the corpse of a leviathan frozen in ice that was still infected by Kharaa. However , instead of destroying the Kharaa, Alterra decided to start researching the bacterium for useful applications. Fearing another outbreak and concerned Alterra will use Kharaa to develop bioweapons, Samantha decided to sabotage the project by using explosives to collapse the cave holding the leviathan, while her friend, Degasi survivor Marguerit Maida destroyed the lab holding Alterra's Kharaa samples. However, Samantha was inadvertently caught in the blast and killed by falling rubble. Unable to determine the cause of the cave in, Alterra wrote off Samantha's death as a result of negligence. In order to prevent Alterra returning to the planet  to restart their research, Robin recovers a cache of antibacterial agent Samantha had made earlier and uses it to neutralize the Kharaa infecting the frozen leviathan. Eventually, Robin is able to recover all of the components necessary to build a new body and fabricates it. Al-An transfers itself to the new body and decides to return to the precursor homeworld in order to see for itself what had happened to the other Architects, as well as to atone for its past mistakes. Al-An activates an Architect phase gate and Robin travels with Al-An to the precursor homeworld , uncertain of what they will find there. Development. Subnautica: Below Zero was initially envisioned as a downloadable content (DLC) pack for the original "Subnautica" (2018), though its scope eventually expanded significantly, prompting Unknown Worlds to release "Below Zero" as a standalone product. Despite this, it was not considered to be a full sequel to "Subnautica". Announced in August 2018, the game was released into early access for Windows and MacOS on January 30, 2019. The full game was released for these platforms, along with versions for Nintendo Switch, PlayStation 4, PlayStation 5, Xbox One and Xbox Series X/S, on  May 14, 2021. The game has a larger emphasis on storytelling when compared with the original. Reception. "Subnautica: Below Zero" received "generally favorable reviews" according to Metacritic.