Oxygen: Difference between revisions

Latest revision as of 03:16, 28 January 2025

Oxygen (O₂) is a gas that the player requires to stay alive during survival mode gameplay. When diving, the player uses a reserve of oxygen that diminishes over time. The HUD indicator for the player's oxygen supply is located on the bottom left of the screen, and the player has a base reserve of 45 units of oxygen. At first returning to the surface is the easiest way to find oxygen. This will quickly and automatically refill oxygen to capacity, however other methods can also be found to restore oxygen.

The PDA will initially alert the player if they have less than 10 units of oxygen remaining. The PDA will also alert the player when they have 30 units of oxygen remaining if they are diving far from the surface.^[1] If the player runs out of oxygen, their screen will begin fading to black, and they will have about 4 seconds to get to an air source before the screen completely fades out, and another 4 before they die. In Hardcore Mode the player still needs oxygen to live, but all alerts from the PDA will be disabled and will not make any audio alerts.

Extending oxygen

The player's base oxygen capacity can be increased by 30 units by equipping a Standard O₂ Tank, which will give enough time for the 30 seconds alert to play. 225 units is the maximum possible units of oxygen, which can be obtained through equipping the Ultra High Capacity Tank. Air tanks will be automatically used when equipped, including being filled if in breathable atmosphere, and will keep their fill level if moved to the inventory.

The depth to which the player dives will initially affect the rate of oxygen consumption. When diving shallower than 100m of depth, the player will consume one unit per second; when diving between 100m and 200m, three units are consumed per second; when diving deeper than 200m, five units are consumed per second. This can be counteracted completely by equipping a Rebreather, which will cancel out all depth debuffs.

The player's oxygen reserve automatically replenishes whenever they:

Rise up to the surface
Swap an equipped empty O₂ tank for a full one
Eat a raw Bladderfish
Interact with an oxygen-containing life form or or environmental feature (see below).
Approach the end of a functioning Pipe
Enter a powered Seabase or vehicle

Oxygen is always present in the starting locations, Lifepod 5 and the Drop Pod. Oxygen will be automatically produced within a Seabase, Seamoth, Seatruck, Prawn Suit, and Cyclops naturally, as long as they are powered with energy. If they run out of energy, no oxygen will be produced. If a fire starts in the Cyclops, it will produce smoke that causes the player to lose oxygen over time. Promptly put out the fire with a Fire Extinguisher to prevent suffocation.

Environmental oxygen

Brain Coral

Main article: Brain Coral

Brain Corals in Subnautica release bubbles that rise to the surface, granting the player oxygen if they touch the bubble. Easily found even in the Safe Shallows biome and aboard peaceful Reefback Leviathans. They can also be planted in Exterior Growbeds at locations of the player's choosing for easy access.

Ice Bubbles

Main article: Ice Bubbles

Ice Bubbles in Subnautica: Below Zero are a source of oxygen exclusive to the Arctic and underwater sections of the Glacial Basin. They require the player to cut them open through the use of a Laser Cutter, and when opened, will produce a steady stream of oxygen bubbles.

Oxygen Plant

Main article: Oxygen Plant

Oxygen Plants in Subnautica: Below Zero are a flora species found in many deep biomes of Sector Zero. Interacting with the plant's bulb gives the player oxygen.

Titan Holefish

Main article: Titan Holefish

Titan Holefish in Subnautica: Below Zero are a fauna species found in the Sparse Arctic and the two Arctic Regions. They swim very slowly and are passive, but are surrounded by dangerous Symbiotes that will attack the player when approached. Interacting with the oxygen-filled ring inside their bodies grants the player oxygen.

Trivia

The player can use the console command oxygen to have unlimited oxygen.
If the player is depleted of oxygen and gets to the surface when the screen is fading, the player will cough and sputter as opposed to just gasping.
One of the unused game sound files, as well as a panel in Lifepod 5, states that the atmosphere also contains nitrogen, likely making it very Earth-like. It doesn't mention percentage contents, however.
In early versions of the game originally it was shown that submarines would have had Oxygen. More or less oxygen would be in the submarine depending on the amount of space in the submarine. While for larger submarines this was removed in the 5th prototype, the Seamoth kept it's limited Oxygen until the game's Early Access release.

References

↑ The alerts play when there are 10 and 30 units left. The basic alert says "Oxygen", and with a capacity upgrade another alert says "30 seconds of Oxygen remaining". However, depending on the current depth, the player can deplete three or five units per second, so when the alert says "30 seconds of Oxygen remaining", there could be less than 10 seconds before the player asphyxiates.

[alert-1] The alerts play when there are 10 and 30 units left. The basic alert says "Oxygen", and with a capacity upgrade another alert says "30 seconds of Oxygen remaining". However, depending on the current depth, the player can deplete three or five units per second, so when the alert says "30 seconds of Oxygen remaining", there could be less than 10 seconds before the player asphyxiates.

[1]

@@ Line 1: / Line 1: @@
-{{SubnauticaLink|Oxygen}}[[File:O2.png|thumb]]
+[[File:O2.png|thumb]]
-'''Oxygen''' (O<sub>2</sub>) is a gas that is needed by the [[player]] to survive. When diving, the player uses a reserve of oxygen that diminishes over time. If the player runs out of oxygen, the player's screen will begin fading to black, and they will have about 4 seconds to get to an air source before the screen completely fades out and they die.
+'''Oxygen''' (O<sub>2</sub>) is a gas that the [[player]] requires to stay alive during [[Game Modes|survival mode]] gameplay. When diving, the player uses a reserve of oxygen that diminishes over time. The HUD indicator for the player's oxygen supply is located on the bottom left of the screen, and the player has a base reserve of 45 units of oxygen. At first returning to the surface is the easiest way to find oxygen. This will quickly and automatically refill oxygen to capacity, however other methods can also be found to restore oxygen.
+The [[PDA]] will initially alert the player if they have less than 10 units of oxygen remaining. The PDA will also alert the player when they have 30 units of oxygen remaining if they are diving far from the surface.<ref name="alert">The alerts play when there are 10 and 30 units left. The basic alert says "Oxygen", and with a capacity upgrade another alert says "30 seconds of Oxygen remaining". However, depending on the current depth, the player can deplete three or five units per second, so when the alert says "30 seconds of Oxygen remaining", there could be less than 10 seconds before the player asphyxiates.</ref> If the player runs out of oxygen, their screen will begin fading to black, and they will have about 4 seconds to get to an air source before the screen completely fades out, and another 4 before they die. In [[Game Modes#Hardcore Mode|Hardcore Mode]] the player still needs oxygen to live, but all alerts from the PDA will be disabled and will not make any audio alerts.
-The player's oxygen reserve automatically replenishes whenever they:
-* Come up to the surface
-* Enter a powered [[Vehicles|vehicle]] or [[Seabases|Seabase]]
-* Approach the end of a functioning [[Pipe]]
-* Come into contact with bubbles released from [[Brain Coral]]
-* [[Food & Water|Eat]] a raw [[Bladderfish]] (only work in survival or hardcore mode)
-* Simply swap their O<sub>2</sub> tank to a not yet depleted one.
+==Extending oxygen==
-Oxygen is automatically produced within a [[Seabases|Seabase]], [[Seamoth]], [[Prawn Suit]], and [[Cyclops]] naturally, as long as they have [[energy]]. If they run out of power, no oxygen will be produced. Oxygen is always present in [[Lifepod 5]].
+The player's base oxygen capacity can be increased by 30 units by equipping a [[Standard O₂ Tank|Standard O<sub>2</sub> Tank]], which will give enough time for the 30 seconds alert to play. 225 units is the maximum possible units of oxygen, which can be obtained through equipping the [[Ultra High Capacity Tank]]. Air tanks will be automatically used when equipped, including being filled if in breathable atmosphere, and will keep their fill level if moved to the inventory.
+The [[Depth Levels|depth]] to which the player dives will initially affect the rate of oxygen consumption. When diving shallower than 100m of depth, the player will consume one unit per second; when diving between 100m and 200m, three units are consumed per second; when diving deeper than 200m, five units are consumed per second. This can be counteracted completely by equipping a [[Rebreather]], which will cancel out all depth debuffs.
+The player's oxygen reserve automatically replenishes whenever they:
+* Rise up to the surface
+* Swap an equipped empty O<sub>2</sub> tank for a full one
+* [[Food & Water|Eat]] a raw [[Bladderfish]]
+* Interact with an oxygen-containing life form or or environmental feature (see below).
+* Approach the end of a functioning [[Pipe]]
+* Enter a powered [[Seabases|Seabase]] or [[Vehicles|vehicle]]
+Oxygen is always present in the starting locations, [[Lifepod 5]] and the [[Drop Pod]]. Oxygen will be automatically produced within a [[Seabases|Seabase]], [[Seamoth]], [[Seatruck]], [[Prawn Suit]], and [[Cyclops]] naturally, as long as they are powered with [[energy]]. If they run out of energy, no oxygen will be produced. If a fire starts in the [[Cyclops]], it will produce smoke that causes the player to lose oxygen over time. Promptly put out the fire with a [[Fire Extinguisher]] to prevent suffocation.
-The HUD indicator for the player's oxygen supply is located on the bottom left of the screen. The player has a base reserve of 45 units of oxygen, which can be increased by 30 units by equipping a [[Standard O₂ Tank|Standard O<sub>2</sub> Tank]]. 225 units is the maximum possible units of oxygen.
+==Environmental oxygen==
-The [[PDA]] will alert the player if they have less than 10 oxygen remaining. The PDA will also alert the player when they have 30 oxygen remaining if they are diving far from the surface.<ref name="alert">The alerts play when there are 10 and 30 units left. The first one simply says "Oxygen", and the second one says "30 seconds of Oxygen remaining." However, depending on the current depth, the player can deplete three or five units per second, so when the alert says "30 seconds of Oxygen remaining," there could be actually less than 10 seconds.</ref> The PDA will not play these alerts in [[Game Modes#Hardcore Mode|Hardcore Mode]].
+===Brain Coral===
+[[File:Brain Coral Coral.png|thumb|150px]]
+{{Main|Brain Coral}}
+Brain Corals in ''Subnautica'' release bubbles that rise to the surface, granting the player oxygen if they touch the bubble. Easily found even in the [[Safe Shallows]] biome and aboard peaceful [[Reefback Leviathan]]s. They can also be planted in [[Exterior Growbed (Subnautica)|Exterior Growbed]]s at locations of the player's choosing for easy access.
+===Ice Bubbles===
-The [[Depth Levels|depth]] to which the player dives affects the rate of oxygen consumption. When diving less than 100m, the player will consume one unit per second; when diving between 100m and 200m, three units are consumed per second; when diving deeper than 200m, five units are consumed per second. This can be counteracted completely by equipping a [[Rebreather]], which will cancel out all depth debuffs.
+[[File:IceBubble InfoboxIcon.png|thumb|150px]]
+{{Main|Ice Bubbles}}
+Ice Bubbles in ''Subnautica: Below Zero'' are a source of oxygen exclusive to the [[Arctic]] and underwater sections of the [[Glacial Basin]]. They require the player to cut them open through the use of a [[Laser Cutter (Below Zero)|Laser Cutter]], and when opened, will produce a steady stream of oxygen bubbles.
+{{clear}}
+===Oxygen Plant===
+[[File:Oxygen Plant Flora.png|thumb|150px]]
+{{Main|Oxygen Plant}}
+Oxygen Plants in ''Subnautica: Below Zero'' are a [[flora]] species found in many deep biomes of [[Sector Zero]]. Interacting with the plant's bulb gives the player oxygen.
+{{clear}}
-If a [[Cyclops]] contains a fire, it will produce smoke. This smoke, over time, causes the player to run out of oxygen and suffocate.
+===Titan Holefish===
+[[File:Titan Holefish Fauna.png|thumb|150px]]
+{{Main|Titan Holefish}}
+Titan Holefish in ''Subnautica: Below Zero'' are a [[fauna]] species found in the [[Sparse Arctic]] and the two [[Arctic]] Regions. They swim very slowly and are passive, but are surrounded by dangerous [[Symbiote]]s that will attack the player when approached. Interacting with the oxygen-filled ring inside their bodies grants the player oxygen.
+{{clear}}
 == Trivia ==
 * The player can use the [[Console Commands|console command]] <code>oxygen</code> to have unlimited oxygen.
-* If the player is depleted of oxygen and gets to the surface when the screen is fading, the player will cough and splutter as opposed to just gasping.
+* If the player is depleted of oxygen and gets to the surface when the screen is fading, the player will cough and sputter as opposed to just gasping.
-* One of the unused game sound files states that the atmosphere also contains nitrogen, likely making it very Earth-like. It doesn't mention percentage contents, however.
+* One of the unused game sound files, as well as a panel in Lifepod 5, states that the atmosphere also contains nitrogen, likely making it very Earth-like. It doesn't mention percentage contents, however.
+*In early versions of the game originally it was shown that submarines would have had Oxygen. More or less oxygen would be in the submarine depending on the amount of space in the submarine. While for larger submarines this was removed in the 5th prototype, the Seamoth kept it's limited Oxygen until the game's Early Access release.
 ==References==