Cut Content

Alien Data Terminal [Unused Variant]
An unused version of the Alien Data Terminal with a more cyan hue. Where this would have been located is unknown, although it can be assumed that it would have functioned identically to the Orange and Green Terminals.

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Ion Cube Matrix
An Ion Cube Matrix is a piece of technology that was originally planned to be used in the construction of the Neptune Escape Rocket. However, it was replaced with Ion Power Cells.

An Ion Cube Matrix would be crafted with five Ion Cubes.

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Red Tablet
The Red Tablet or Red Precursor Key is an unused Alien Tablet that was going to presumably deactivate forcefields.

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White Tablet
The White Tablet or White Precursor Key is an unused Alien Tablet that was previously intended to unlock the Alien Thermal Plant. The white tablet was a 4 (2×2) slot item, rather than a 1 slot item like all the other keys. If one summons precursor keys in the developer menu, they will get a White Tablet and a Red Tablet.

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Arctic
The Arctic biome was never actually implemented into the game, but was labeled and even put onto the maps found in the game's folder during early development. The biome stayed through development for a long time before it was eventually replaced and scrapped. Very few leftovers of this biome exist.

Inside the game files are multiple references to this biome, including old textures, biome ids, and even a cut Cold Watereffect.

This biome likely inspired Subnautica: Below Zero's location.

Lilypad Islands
Floating in the water, the Lilypad Islands appears to be a biome of large lilypad structures rooted to medium-sized chunks of land. These Lilypads likely held the rocks in the water, keeping them afloat. This biome was likely replaced with the Underwater Islands biome, as it has the same properties as the Lilypad Isands.

This biome appears in Subnautica: Below Zero.

Twisty Bridges
The Twisty Bridges was a biome originally planned to be found in Subnautica. Development started as early as prior to the first early access release. Although some flora was made for the the biome, it was left unfinished and eventually was cut from the game.

The biome was set to contain multiple cut items as well. The Mohawk plant was one of the cut Flora found dotting the landscape. The Blue Barnacles, which are still currently used in-game, were intended to line the bottoms of all the bridges. Both could be found in the Entity Gallery. The biome appeared to have been very similar to the Safe Shallows in design, Fauna, and Flora.

The biome was considered possible post 1.0 or expansion content, but was instead included in Subnautica: Below Zero.

Entity Gallery
The Entity Gallery was a series of textureless, white boxes that could be spawned by typing "entgal" into the console. On top of each box an entity from the world of Subnautica could be found. Of the various things found here, the models of the scrapped "Sandworm" and "Grab Crab" creatures were perhaps the most notable.

The entity gallery's removal may have been due to the multiple occasions in which Precursor objects were mistakenly added to the gallery; This resulted in Precursor objects and bases being revealed to the public long before they were intended to be. The most well known example of this was Experimental Update Version 46346, the "Skittles Update," in which many of the games textures were converted to multicolored squares, this was because the game had gone over the limit of textures by the accidental addition of the Quarantine Enforcement Platform model and several other Precursor props to the gallery.

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Seal
The Seal command would have set the player's speed to a 5x multiplier. This was removed along with the ability to change speed not long after the Early Access Release.

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Shark
The Shark command would have set the player's speed to a 10x multiplier. This was removed along with the ability to change speed not long after the Early Access Release.

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Sonic
The Sonic command would have set the player's speed to a 50x multiplier. This was removed along with the ability to change speed not long after the Early Access Release.

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Brain Coral Sample
These cut Brain Coral Small appear to have been a relative to the Brain Coral added in game. They likely would have been smaller variants, possibly providing lesser amounts of oxygen.

Dead Brain Coral
Dead Brain Coral is a cut form of Brain Coral from older versions. The coral would change to this white form when hit by the Survival Knife several times, similar to dead coral found in Earth's oceans. The coral would stop producing oxygen when dead.

This effect is still present in Slanted Shell Plate and Giant Bulb Bush

Reefback Coral 01
The Reefback Coral 01 is an unused type of Reefback Leviathan Coral set to appear on its back. It is unknown why this coral remains unused as it is fully modeled and textured.

Current Generator
The Current Generator was a deployable crafted using the Fabricator. The Current Generator took up four slots in the player's Inventory, meaning the player could carry twelve of them in a clear inventory. The Current Generator used no power and could be left active indefinitely.

Once the device was deployed and activated, it would produce a column-shaped hydro-current from an emitter on its front. This stream could push small and large objects alike, including Lifepod 5 and the Reefback Leviathan. However the Seamoth and Cyclops were not affected by the Current Generator.

The Current Generator has been scrapped and is no longer available in the game. This could be to the fact that it would create lag and/or loading problems.

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Lithium Ion Battery
The Lithium Ion Battery was an upgrade to the Battery, crafted using a Modification Station. The Lithium Ion Battery held twice as much energy as the Battery. The Lithium Ion Battery can now only be crafted in Creative Mode.

The Ion Battery is the replacement to this upgraded battery. It uses an Ion Cube instead of Lithium to be crafted and has 500 power, whilst the Lithium Ion Battery has 200.

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Nanowires
Nanowires were a nano-scale Electronic item crafted from Mercury Ore that was intended for quantum devices and sensors.

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Cold water
Cold Water was less of a physical object and more of a status effect. When in Cold Water, the player's breathing would become ragged, depleting oxygen faster than normal. The player would also take damage if not properly protected using anything that provides Cold Resistance[2].

In the game files, assets for this effect exist. When spawned in game, they will instantly kill the player and display a bright blue effect, simulating cold damage. This effect was likely to appear in Arctic biome.

Ice Spikes
Ice Spikes would grow downwards inside the Arctic biome, forming Ice Patches in the surrounding area. These would inflict cold damage if not properly protected[2].

Ice Patches
Ice Patches were patches of frozen ground that had less friction. Prawn Suits and terrestrial Fauna would have been at risk of slipping and sliding across the ground. These patches of ice were to have appeared in the Arctic biome[2].

Falling Spires
Falling Spires are currently located in the Lava Zone, however, they do not hold the same purpose they do now. In early development, these spires would have been affected by vibrations. If they were damaged enough, they would have collapsed and fallen over. These would only do crush damage[2].

Lava Bridges
For bottom-dwelling Fauna and Prawn Suits, Lava Bridges could prove dangerous. These bridges were weak connectors over large chasms and lava pits. However, if disturbed too heavily these bridges would collapse, dealing damage to the player, creatures or vehicles. These would have extensively been used in the Lava Zone[2].

Lava Sinkholes
Lava Sinkholes were large holes in the seabed found in the Lava Zone with an odd, almost bubble-like object in the center. After a period of time, these bubbles would burst, erupting outwards violently and inflicting damage[2].

A single sinkhole exists within the Inactive Lava Zone known as the Lava Pit. It is purely decorative and does not have any of the features mentioned above.

Currents
Currents would have acted as moving water that would push items around, such as small Fauna, or possibly even the player. They could be found in different places, including caves. They are often diurnal, sometimes nocturnal. This idea was likely worked into the Current Generator before it was eventually cut as well[2].

Water Streams
Water Streams were a type of Ocean Current that would be much weaker than normal. They are smaller, and are easier to swim through. They were to be considered universal, found in multiple places around the map[2].

Whirlpools
Whirlpools were designed to suck the player in and down. They would either block progression slightly, sucking the player away from locations and downwards, or they would pull the player down into aggressive fauna. These could occur anywhere, but were intended to be very noticeable[2].

Physical Rocks
Physical Rocks were simple obstacles that were able to shift and move when vibrations occured. They would also set off any motion-sensing triggers. Smaller ones could be picked up as items[2].

Silt
Sitting on the seabed, Silt acted as loose particles that, when interacted with by a creature or object, would obscure vision and become disturbed. Silt was usually located in caves, making it harder to visibly traverse them[2].

Weather
One of the most highly requested features all throughout development, Weather was a system that was planned but never developed fully. The timing and different technical aspects of what weather would have been are unknown. It is confirmed that there were at minimum two main weather conditions and some wind effects, as heard in the sound files which can be played below.

The two moons of Planet 4546B would drastically affect the timing, severity, and type of weather. Some known types of weather were rain, snow, lightning storms (with ranging severity), and tsunamis. The worse the weather was, the harder it was to traverse the area underwater[2].

Weather was eventually recycled for Subnautica: Below Zero, which has intense lightning storms, rain storms, and snow.

Thermometer
The Thermometer was a piece of equipment that allowed the player to see the temperature at their current location. It was removed because it was hard to implement into the latest HUD, and was rarely used during gameplay, which rendered it not worth keeping.[4] Its removal was made more apparent by the addition of built in thermometers on vehicle HUDs (Seamoth , Prawn Suit, and Cyclops). Despite being removed, the blueprint can still be found in the PDA.

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Bloom Plankton
Bloom Plankton are a small fauna species that were never implemented in the game, but can be spawned with "spawn bloom". Bloom Plankton is found only in groups and usually invisible, only becoming visible when they are "charged" with light. Their color can be altered by shining different types of light onto them. Shining a Flashlight into a group of Bloom Plankton will cause them to glow bright white in colour; if a flare is thrown near a group of Bloom Plankton they will glow red in color. This color will be retained for a brief moment before going invisible again.

When charged, they become a light source and will light up their surroundings. This could be used to the Player'sadvantage to navigate in dark areas. When charged with light, Bloom Plankton will constantly shift and move amongst each other. Bloom Plankton will swarm around light sources and stay near it.

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Bullet Fish
References to a Bullet Fish have been found in the game files. Its behavior is quite similar to that of a Crashfish. The Bullet Fish would hide in a hole, waiting for the player to come in range. It would then quickly shoot out of the hole and begin to chase the player. If the fish manages to get close enough to the player, it would take 10 seconds worth of their oxygen. The fish would then swim back into the hole. The creature never received a final model and was eventually cut from the game.

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Grabcrab
The Grabcrab was a Fauna that would leave its home to grab food and items. The Grabcrab Home, however, was never finished, and is merely seen as a placeholder. The Grabcrab was not spawnable in-game, but has been noted to have appeared in both early development footage and the Entity Gallery.

The Grabcrab had sounds found in the game files of Subnautica. They can be played on the chart below.

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Grower
Referenced in the game files, the Grower was a simple creature that was never implemented. There is no model or texture for this creature, only a script. The creature was intended to simply grow and shrink in size, as well as pulse. There is no other known information on this creature.

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Large Bird
This unnamed bird was dubbed the Large Bird by many. This bird was featured in the Subnautica Early Access Trailer and is seen flying along with a flock of Skyrays. However, even though the bird had a completed model, it was never put into the game. The Large Bird has been hinted at being featured in Subnautica: Below Zero.

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Reefback Leviathan Cut Features
The Reefback Leviathan had two cut features that were intended to be given to it. The first is Burrowing. They originally were to be burrowed into the ground to rest peacefully. Flora, Coral, and other small creatures would eventally reside on the top of them. If five or more moderate-sized creatures were too close, however, the Reefback Leviathans would become disturbed. They would slowly rise out of the sand, and drift to a quieter place to rest[6].

The second cut feature Reefback Leviathans were intended to have was Riding. Originally, the Player was intended to have the ability to grab the tentacles and hitch a ride on the Reefback Leviathan, as well as hide in the mass amounts of Flora atop them from predatory Fauna[6].

Rock Puncher
The Rock Puncher was one of the most developed cut creatures. It had a complete model, working animations, and worked in-game. However, it was never added and was eventually cut entirely. The Rock Puncher was to originally appear as a creature that would punch into rocks and terrain using its large appendages that closely resemble boxing gloves. It has six legs, and could walk in all directions. The Rockgrub was originally referenced as a Rock Puncher Larva, then Rock Puncher Food, before finally keeping it as Rockgrub. The Rock Puncher was later reused for Below Zero

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Sand Worm
The Sand Worm was a scrapped creature. Although unfinished, the intended purpose of this creature was to have it burrow into a hole similar in appearance to a Tree Leech, and surprise the player, or any fauna that came near it in a similar fashion to the Reaper Leviathan and Crabsnake attacks. It appeared in the entity gallery and could be spawned in the game at one point.

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Sea Dragon Seamoth Animation
The Sea Dragon Seamoth Animation was a cut attack animation made for the Sea Dragon Leviathan in which it would grab the Seamoth and put it into its mouth in an attempt to crush the vehicle, similar to the existing animation for the Prawn Suit.

This animation was ultimately cut from the game due to being pointless, as the Seamoth's max depth was insufficient to reach the Lava Zone where the Sea Dragons reside so this animation would never occur in normal gameplay.

Slime
Found in the game's files a reference for some kind of Slime. No other information is known about it aside from the fact its ID exists. It can only be spawned as an item and there is no official model or texture for this creature.

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Hanging Seaweed
Hanging Seaweed was intended to be found around the Coral Reef (Safe Shallows), and was simply seaweed that would hang over cliffs and off objects. There was no known use for them. They were likely only decoration for the area[7]

Mohawk
The Mohawk was a cut plant planned to be part of the cut Twisty Bridges biome. These plants featured a curved shape, lined with fibers. At one point in development a Mohawk could be found in the Jellyshroom Cave.

These plants later appeared in the Twisty Bridges biome in Subnautica: Below Zero.

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Plant Middle 11
Plant Middle 11 is an cut plant that appears to be a collection of different blades. These plants were reskinned and implemented into Subnautica: Below Zero.

Spike Trap
The Spike Trap was a cut flora that was intended to grab onto the player from below and pull them inwards. They would do this using the four, orange tipped, white tendrils attached to the main body. It would have dragged the player in towards its large mouth seen at the center.

Because of the presence of a Spike Trap Seed icon, the Spike Trap could have been planted and grown on Exterior Growbeds. It is unknown if this would have provided extra uses.

The Spike Trap later appeared in Subnautica: Below Zero as a recolored variant.

Stitchgrass
Stitchgrass was intended to be a special plant that, when interacted with, would provide healing to nearby creatures. The player could use this plant to heal wounds, but using it too much in a short period time would kill it, no longer being able to heal. Stitchgrass could be found in almost any biome.[2]

Unnamed Flora
This Unnamed Flora appears to be a Bioluminescent plant. It is made up of multiple fibers stretching upward, with tips that seem to glow a bright white.

Composting
Composting was a mechanic that was used to obtain Ethanol and Composted Materials, such as Compost Creepvine. This process likely would have involved placing plant matter into a Composter and allowing it to compost over time, then collecting materials and Ethanol. A similar process could have been done with Fertilizer, which would convert Ethanol into Ethylene[6].

Dialogue
Throughout Subnautica's development, there have been multiple instances of Dialogue, some of which have been cut, unused or updated and the old versions removed. The Dialogue page contains all cut and unused Dialogue found in the game files.

Durability
During early access, Durability was a mechanic where the Survival Knife had durability. The Survival Knife had 100 durability and would break when it reached zero. The Thermoblade had 34 durability while the Hardened Blade had a durability of 200. Durability was only present on knives, which lead to this mechanic being removed alongside the Hardened Blade.

Overeating
During development, Overeating was a mechanic that would occur after the consumption of too many food items. If too many were eaten, the Overeating effect would occur, in which the player would begin to lose health due to blood loss¹. The only food item exempt from this was the Gel Sack. ¹ Easter Egg: This is a reference to Half Life

Upon eating too much, you are first warned of the impending complications that eating more will bring. If eating continues, the player would start to lose blood and take damage, which the PDA would notify you of.

Terrain Generation
In Subnautica's early development, Terrain Generation was a planned feature. It would have worked by developing tile sets to randomly generate a certain biome. Using the Voxel Terrain system, these tile sets would have meshed together into a world that would be explorable. It is currently known that there were tile sets for the Lava Zone[8], Safe Shallows, Kelp Forest[9], Mushroom Forest and Bulb Zone[10].

Amino Acid
Amino Acid was an unimplemented raw material. It was used to create Graphene.

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Battery Acid
Battery Acid was a craftable substance likely used while crafting Batteries. Not much else is known about this substance.

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Calcium
Calcium was a craftable resource that was used in the production of Bleach and was made from Coral Tube Samples. It has now been replaced by Salt Deposits in the recipe for bleach.

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Carbon
Carbon was a substance that changed a few times before it eventually was cut. First, it was crafted by refining either plant matter or Calcite[6]. In later development, this recipe was changed to require three Acid Mushrooms before it was eventually cut. It was primarily used to craft Batteries.

In old versions of the game, Carbon could be obtained by slashing a Stalker with a Survival Knife. It isn't fully known why this occurred or if it was intentional.

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Compost Creepvine
Compost Creepvine was a special type of Creepvine substance that was likely made through Composting at a Composter. The substance's purpose is unknown.

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Emery
Emery was a material planned to be found in Subnautica. Not much is known about it other than the fact that it was used to craft the Survival Knife.

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Ethanol
Acting as Vehicle Fuel, Ethanol was intended to be used in the crafting of Ethylene and the powering of different Vehicles. It was to be made at a Composter from decaying/decomposing plant matter[6].

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Ethylene
Not much is known about Ethylene aside from the fact it was used to stimulate and ripen fruit, cause flowers to bloom, and allowed leaves to shed[6].

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Flint
Flint was a raw material used for crafting Flares. It was generally found in the Kelp Forest and Grassy Plateaus.

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Graphene
Graphene was a material that was crafted at the Fabricator.

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Hydrogen
Hydrogen was a gas-like substance used in crafting. Hydrogen was used to craft three Flares. To obtain Hydrogen, an Electrolizer would have been used. Calcium would produce Hydrogen when placed in water.

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Lodestone
Lodestone is an unknown material, only defined by it's ID. It does not appear to spawn in-game, and no information can be found on it in any documentation.

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Magnesium
Magnesium was a material crafted using three Salt Deposits in the Fabricator. Magnesium was only used in two crafting recipes, that of the Repair Tool and Flare. As it was only used in a few recipes it was rendered useless and was removed.

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Membrane
Membrane was a material obtained from Membrain Trees. It was originally planned to be used in the crafting of water, but eventually was removed and replaced by the Bladderfish in its sole recipe.

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Mercury Crystal
Mercury Crystal was a raw material planned to be used in crafting. It was a rare substance used in Thermometers, Barometers, Manometers, Sphygmomanometers, float valves, Mercury Switches, Mercury Relays, and Fluorescent Lamps. This ore was intended to be found at the border of Volcanic and Crystal biomes[6]. It was only able to be found in the Entity Gallery on Early Access Release, but could spawn in earlier development builds.

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Mercury Ore
Mercury Ore was an uncommon material found in various biomes that was used solely to craft the Cyclops Fire Suppression System before being replaced by Crystalline Sulfur. It then remained in game until the full release, when it was finally cut. Mercury Ore spawned in the following biomes: ID:
 * Crag Field
 * Deep Grand Reef
 * Grand Reef
 * Sea Treader's Path
 * Sea Treader's Tunnel Caves
 * Sparse Reef

Neoprene
Neoprene was a substance crafted using Zinc at a Fabricator. It was used to craft Fins, Knives, Dive Tools, a Hammer, Welders, Seajets, and Flares. The specifics of this substance is unknown[6].

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Rutile
Rutile was a natural resource that existed in the early builds of Subnautica. It did not spawn naturally and had to be spawned in through Console Commands. It is no longer in game. Given that rutile is a form of titanium dioxide it is likely that this was replaced by Titanium.

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Sand
Before terraforming was removed, you could dig Sand in the environment. It would be used to create Glassand Silicone. It was the only substance that could be dug without the use of a Terraformer. The sand item was removed before the dig feature, making it unobtainable.

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Uranium
Uranium was an item belonging to the Advanced Materials category that was removed in the Voice of the Deep update. It was crafted using three Uraninite Crystals, and was used in the crafting of Reactor Rods and several Electronic items. Uranium was removed to simplify the Reactor Rod recipe[11].

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Zinc
In early builds, Zinc could be obtained from Limestone Outcrops and Stalagmites. It was primarily used for crafting batteries, but was also involved in the crafting of Neoprene[6].

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Base Cyclops Reinforcement Module
The Base Cyclops Reinforcement Module was an Upgrade Module for the Cyclops. When used to upgrade the Cyclops, it added 1600 meters to both the safe depth and the crush depth. This item was removed when the new, non-stacking upgrade system was introduced. Works in game but has no icon.

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Chelonian Hull Reinforcement Module
The Chelonian Hull Reinforcement Module added 2800 meters to both the safe depth and the crush depth. It was the strongest reinforcement module. To create the module, blueprints from the Specimen Analyzer were required as Reefback DNA was part of the recipe. This item was removed when the new, non-stacking upgrade system was introduced, along with the removal of DNA samples. Works in game but has no icon.

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Cyclops Pressure Compensator
The Cyclops Pressure Compensator was an Upgrade Module for the Cyclops. When put into the Cyclops upgrade panel, it added 900 meters to both the safe and crush depth. Works in game but has no icon.

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Aluminium Oxide Deposit
The Aluminum Oxide Deposit was an ore deposit that was intended to give Aluminum Oxide (which was renamed to the Ruby later in development) upon being drilled. It was never implemented.

Diamond Deposit
Diamond Deposits were intended to drop Diamonds when mined. They were never implemented into the game.

Mercury Deposit
Mercury Deposits were cut along with Mercury Ore. They were findable in most places Mercury Ore was located.

Sulfur Deposit
Sulfur Deposits originally were intended to drop Crystalline Sulfur when broken. They were likely intended to be found under the brine in the Lost River.

Basalt Outcrop
Basalt Outcrops were a common outcrop type that spawned in many biomes, and looked very similar to the Shale Outcrop. They dropped Gold, Diamond, and Uraninite Crystals. They received a final model and why they were removed is not fully known. Basalt Outcrops spawned in the following biomes: ID:
 * Blood Kelp Caves
 * Blood Kelp Zone
 * Bulb Zone
 * Bulb Zone Caves
 * Crag Field
 * Deep Grand Reef
 * Grand Reef
 * Lava Geyser
 * Mountain Island
 * Mountains Caves
 * Mushroom Forest
 * Sea Treader's Path
 * Sea Treader's Tunnel Caves
 * Underwater Islands

Calcite
Calcite acted as both an outcrop and a material. When broken up it would drop Calcium, but would also allow harvesting of the chunks for other uses. These uses included Cements, Fertilizers, Metals, Glass, Rubber, and Paint[6].

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Dolomite
Dolomite was a harder and denser type of outcrop. It would drop Copper Ore when harvested. It also had the possibility of giving Gasses or Oil[6].

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Obsidian Outcrop
Obsidian Outcrops were Harvesting Nodes found in the Lava Zones, they dropped only Diamond and never received a final model. They spawned in the following biomes: ID:
 * Inactive Lava Zone
 * Inactive Lava Zone Corridor
 * Lava Castle
 * Lava Lakes

Rocks
Rocks were small outcrops that spawned in the Mushroom Forest. They usually dropped Magnesium, although they had a small chance to drop Copper Ore.

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Minimap
Featured on old development documentation[6], the Minimap was a planned feature for the game. This would have worked by tracking areas you had been and displaying them on the Minimap as mapped terrain. This feature appears to have been cut long before any playable version of the game was finished.

Scanning System (OLD)
The Scanning System in older documentation[6] detailed some differences. Upon looking directly at an object for multiple seconds, a short description of the item would appear on the HUD. These messages would only appear if they had not been shown in the last ten messages during the current play session.

If objects were scanned with a Scanner, they would both display their short description no matter how long since it had been seen, as well as unlock an optional longer version. These were likely similar to the Databank entries in the game currently.

Signals
Even though the are still in the game, Signals have gone through many changes. The most prominent was a move from items to being on their own PDA page. Before they had a custom tab (which is between the Inventory and Log tabs) they were items you could find in chests and containers, or were given when a radio signal was obtained.

In early development, Signals were simply found in either chests or containers, and they usually lead to simple places. Some lead to caves, others to certain locations. Lifepod 5 was the only one that was on at all times and needed no object to work. These Pings would be equipped either by holding them in your hand or placing them in the Chip Slots.

During early development, these Pings appeared as simple white blips that would expand and fade. There was no way to edit them at all, and they would simply give a location. Before they were given an icon, they appeared in the world as placeholder white "X" markers. They were eventually given a final design image before being cut and changed into the item-less system.

Below is a compilation of all cut Signal Locations from the game. Some locations were cut from the game entirely, while others remained but lost any pings related to them.

Accumulator
The Accumulator was a machine meant to store power for Seabases. It is unknown why it was cut.

ID:   (does not work)

Bioreactor (OLD)
The old Bioreactor was built outside of a base and could only be powered using Fungal Samples and Creepvine Samples.

ID: bioreactor

Botanical Analysis Machine
The Botanical Analysis Machine was a machine meant to study Flora. It was cut when the Scanner was added. It was built with the Habitat Builder.

Centrifuge
The Centrifuge was meant to be used to turn DNA samples collected using the Transfuser into four transfuser serums. The Centrifuge was to be crafted with a Habitat Builder in a base. It can still be spawned in game, but has no collision and is non-functional.

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Composter
A Composter was a object used to convert plant matter into Ethanol and other types of Plant Matter. It would have likely involved placing materials inside and allowing them to compost over time. There was no known model made, and the tool appears to have been scrapped very early[6].

Fragment Analyzer
The Fragment Analyzer was a Placeable Item that was used to decode Fragments into Blueprints. Only one fragment was needed to research a blueprint; however, the Fragment Analyzer could research four fragments at a time. The progress of analysis was displayed when the player looked at the Fragment Analyzer. At one point a Fragment Analyzer was pre-installed inside the Lifepod. The functionality of the Fragment Analyzer was given to the Scanner and the fragment system was reworked.

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Nuclear Reactor (OLD)
The old Nuclear Reactor was built outside of the Seabase and had to be supplied with raw Uraninite to function.

ID:   (does not work)

Observatory (OLD)
The Old Observatory was a small primitive glass box that could be constructed with the Mobile Vehicle Bay. Unlike the newer Observatory it was not a Seabase module and was instead freestanding. It had two entrances and was primarily used to observe Fauna and the environment. The only way to move it was to use Floaters.

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Power Generator
The Power Generator was a Placeable Item that generated Power for Seabases using Power Cells. The Power Generator had a capacity. In the starting of Subnautica it was the only method to give energy to Seabases. It was only a temporary power source, and was removed when it was essentially replaced by the Nuclear Reactor and Reactor Rods.

Specimen Analyzer
The Specimen Analyzer was a machine meant to study Eggs. It was removed when the Alien Containment and Scanner were added. Despite being removed, you can still see its model in Below zero's Research Base Zero. It can be spawned in game, but doesn't function and only holds small eggs.

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Aurora (OLD)
The Aurora used to be a flat, 2D texture. This texture was based off the Aurora Concept Art, which featured a much sleeker design with a smaller bridge at the top and front-facing windows. The devs threw it together on March 11th, 2014[12] and it was fully implemented on March 25th, 2014[13]

Later into development, specifically seen on August 18th, 2014[14], the Aurora changed to a different 2D image, a much more recent version of the Aurora model. It was in a unique position, similar to the original concepts, but using the newer model.

The next time the Aurora was seen, it was a 3D model, seen during the Early Access launch. Two models, a non-damaged Aurora and a damaged Aurora, where both uploaded to the Trello[15]. The non-damaged model never appears in game.

The Aurora at this stage had no interior. The simple interior was added on April 4th, 2015, the Crash Site Update. This update featured a different Aurora interior, with a different entrance. If the Player were to go underwater at the port side, a hole could be found that lead directly to the Drive Core. Alternatively, going through the front lead directly there after climbing to the top.

Cave Crawler Ending
The Cave Crawler Ending is an older version of the Launch Sequence involving the Neptune Escape Rocket. The ending contained the same string of events with minor changes. The Arctic Landmass the Player looks at is designed differently, and some dialogue was altered slightly. The Sea Emperor's dialogue is not present in this version, nor is the "One Trillion Credits" message. After the screen faded to black, the Credits began.

The name is based off the Cave Crawler, an aggressive scavenger Fauna, which crawls across the roof of the Neptune Escape Rocket at the very end of the cutscene before it cuts to the credits.

Intro (OLD)
In earlier builds of the game, before the Lifepod 5 intro cutscene was added, the PDA originally would monologue the plot as an Intro. In these earlier versions of the game, the plot involved the Aurora being a Terraforming Ship. These ships would terraform other planets to allow for human habitation. On this mission, however, the Aurora was struck by an unknown energy pulse and was shot down, similar to the current in-game event. During these builds, no other story was given until it was replaced. This can be played below.

Ontop of this, there is an even older intro heard in the Jiaolong Testing Video[3]. This older version appears to be audio of Lifepod 5 being jettisoned and landing in the ocean. This is one of the only known recorded versions of this intro.

Kharaa Bacterium (OLD)
Back during early story development, the Kharaa Bacterium looked much different. Instead of its green glow that is seen today, the older version took up a much more different approach. The cysts would have glowed bright orange and the cracks were more visible. This was likely changed to differentiate it from Natural Selection Two's version of the Kharaa.

Drill
The Drill was planned to be an item in Subnautica. Little is known about the drill and it was scrapped in early development. However, its main purpose would probably have been drilling outcrops or drilling in the ground. The icon has since been removed and it no longer has a use.

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Hardened Blade
The Hardened Blade was an upgraded version of the Survival Knife. It was crafted with the Modification Station. Its damage output is 30 health. Before durability was removed, it had double the durability of the Survival Knife. It was removed since it was deemed worthless when durability was removed. Despite being removed, it is still mentioned in the "Degasi Voice Log #8 - Risk Taking."

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Electrolizer
The Electrolizer was a tool that would have converted Water into Hydrogen and Oxygen. When it was used, it would spark and produce evaporation effects. If the tool was use in a submarine, it would add more Oxygen to the sub as it was produced and likely lower the water level slightly (if flooding).

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Powerglide
The Powerglide was an upgrade for the Seaglide. it was 3x the speed of the Seaglide and had a turbo boost that drastically increased its speed. The Powerglide's model was identical to that of the Seaglide's. It was cut early in development due to the player glitching into the ground. It is no longer spawnable, though the ID remains.

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Terraformer
The Terraformer was a tool that allowed the player to remove material from one place in the world and deposit it elsewhere. A counter showed the current amount of material held by the device.

The Terraformer was removed due to performance issues because of the way the Terraformer works. The Terraformer model may later be used for an unknown purpose in later updates, as the developers thought the model was "too cool". If the Terraformer is spawned in more current versions, the description is "RIP terraformer" referring to the development team's disappointment in having to remove it. The item texture in the inventory has also been deleted and changed to the ? icon. Although it is still functional when spawned in, all changes made to the terrain using the Terraformer will be reset upon reloading the world.

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Terraformer Fragments
Terraformer Fragments were to be scattered in certain biomes. They were intended to be scanned to obtain a Terraformer. Where it would have spawned and how many were required to complete the blueprint is unknown. Just like the actual Terraformer, it can still be spawned in.

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Transfuser
The Transfuser was a Tool intended to sample DNA from life forms and then use this DNA in the Centrifuge to create consumable items that would alter the player's or other creatures' attributes. The model was reused for Subnautica: Below Zero's Bioscanner. One can still find it in the creative blueprints.

The Transfuser's description was changed to: congrats translators, we made a game!

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Transfuser Fragments
Transfuser Fragments were to be found in different biomes across the map. They were intended to be scanned to obtain a Transfuser. Where it would have spawned is unknown. It can still be spawned in.

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