Saturation Diving in Roblox vs the real thing

The game: what it is, who made it, and how big it got

If you got here after playing something on Roblox, you are in the right place and you are not being laughed at. Saturation diving is a real occupation with a real name, real rules and real paperwork, and the game took that name on purpose.

The experience is called Saturation Diving. Its Roblox page carries a changing prefix — it has appeared as "[NEW!] Saturation Diving" and "[NEW] [HORROR] Saturation Diving" — and it sits at place ID 83942486971826 under universe ID 10231678265. The creator account is The_BucketHead. According to Roblox's own games endpoint, the experience was created on 27 May 2026 and last updated on 29 September 2026, with a server cap of 50 players and a content rating of "Mild".

Its own description sets the premise: a co-operative horror and adventure game in which you descend to deep-sea sites, clean and mine ore from pipes, upgrade gear and go deeper. The description is frank that the game is unfinished, and it ends on the hook that drives the whole thing: "what kind of life could develop at the bottom of the ocean?" The thumbnail credits two other Roblox users, @Wyster7a and @kqnoya.

Here are the numbers, taken straight from Roblox's public endpoints on 8 October 2026. Concurrency moves by the hour, so treat the live figure as a snapshot rather than a stable statistic.

Source: Roblox games API, universe 10231678265 and Roblox votes API, read 8 October 2026.

One thing worth saying before we go further. We could not read the player-run wiki or verify a Discord server for the game, because those sites were not reachable for us. Player-maintained entity lists and lore pages change constantly and the game is in beta, so if you want the current roster of creatures, the community sources are the right place and the game's own Roblox page is where its official links live. What we can verify is the game's own data, and that turns out to tell you a surprising amount about how it plays.

What the game's own achievement list tells us about how it plays

Roblox publishes every badge an experience awards, with its description and how many players have earned it. That is the game's own account of its mechanics, written by the developer, and it is more reliable than any guide. Here is the list, and what each one implies.

Source: Roblox badges API, universe 10231678265, read 8 October 2026. Two badges with punctuation in their names are omitted; the list is otherwise complete.

Read as data, this says a lot. A dive is made of numbered levels, and a long run is fifteen of them. Monsters can be fought and killed, and killing ten in one run is rare — 2,111 players out of more than 800,000 who finished a first dive. There is a bestiary: "monster logs" you collect, and only 3,021 players have the full set. At least one creature type is called a grimreef. There is a named location called Crash Plateau, an ore called Sanguinite, and a collectible Music Box that only 276 players have used. Upgrades stack up to at least six at a time.

The drop-off is the most interesting number on that table. Four out of five people who complete a first dive never get to six levels. Whatever the game is doing, it is not easy.

What the game gets right about the real job

More than you would expect from a horror game. The core loop is genuinely the shape of real saturation work.

You live under pressure, not at the surface. That is the whole idea, and it is why the job is called saturation. Your tissues absorb inert gas until they reach equilibrium with the pressure you are living at. Once that has happened, the time you still owe to decompression stops growing, so you can work at depth day after day instead of surfacing after every dive. If you want the long version, our page on what saturation diving is covers the physiology.

You commute in a bell. Real divers are not swimming down. They transfer under pressure into a diving bell, the bell is lowered to the worksite, and one or two divers lock out while a third stays inside as bellman. IMCA's recommended practice for saturation system design, D 024, has separate sections for the diving bell, the main bell umbilical and the divers' umbilicals, which tells you how much of the engineering is about that one trip. Our explainer on the closed bell and how it works goes through it step by step.

You are tethered. The umbilical is not decoration. It carries breathing gas, hot water, communications, video and often the diver's depth signal. The game's visual language of a line running back to something that keeps you alive is accurate, and it is the single most important object in a real diver's day.

Work, not sightseeing. Cleaning and inspecting pipework is a real task. So is cutting, welding, bolting flanges, changing anodes and surveying. Mining ore is not, but the rhythm of being sent down to do a specific job on a structure is right.

It gets harder as you go deeper. True, and for reasons the game does not model: gas density, breathing resistance, heat loss, decompression obligation and the shrinking number of systems rated for the depth.

It is a team activity. Real saturation diving involves a bellman, a supervisor, a life support technician, a diving medical technician and a vessel crew. You cannot do it alone, and the game's co-op framing reflects that better than a single-player horror game would.

What the game invents, and why it had to

Four things, mainly.

Monsters. There is no documented case of a saturation diver being attacked by anything resembling a game entity. We went through twenty guidance documents from the Diving Medical Advisory Committee, the body that writes the medical rules for this industry, and the biological hazards they address are bacteria in chamber showers and ear canals. Not predators.

Depth. The game's deep-sea holes and abyssal sites are below anything a human in a suit can reach. The average depth of the ocean is about 3,682 metres and the deepest point, Challenger Deep, is roughly 10,935 metres, according to NOAA. Commercial saturation diving works in the top few hundred metres of that. Our own audit of the global fleet found that 17 of 22 depth-rated dive support vessels are rated to exactly 300 metres, and the deepest in the world is rated 350 metres.

Getting out between runs. In the game you finish a dive, surface, spend your money and go again. In reality you cannot leave. More on this below, because it is the single biggest difference between the game and the job.

Gear shops and upgrades. Diving equipment is owned, certified, inspected and maintained by the contractor. You do not buy your own helmet with ore money. Our equipment pages cover what is actually used.

How a real saturation dive actually runs

Here is the sequence, with the parts that have published limits flagged.

Before anything. A medical, a valid closed-bell qualification, and a project plan. In the UK, offshore commercial diving runs under the Diving at Work Regulations 1997 and the Approved Code of Practice L103, which took effect in its current form on 8 December 2014. IMCA's International Code of Practice for Offshore Diving, D 014, is at revision 3.3 of March 2025 and is the document contractors work to where national regulation is thin.

Compression. You enter a chamber on the vessel and the pressure is raised until the chamber is at your storage depth. From that moment you are committed. Published medical guidance does not fix a single compression rate; contractors use their own tables.

Living. You share a small, warm, humid steel space with a few other people. DMAC 26, revised in June 2025, is an entire document about keeping that space from making you ill: shower at least once a day and after every bell run, launder at depth-side clothing and bedding at a minimum of 85°C, clean the toilet, sink, shower and service locks daily, clean walls, bulkheads and breathing masks twice a week, and use acetic acid ear drops — three or four drops per ear, held for a timed minute, twice daily and after each dive or shower — as a prophylactic against ear infection.

The bell run. You transfer into the bell under pressure, the bell is lowered, and you lock out. DMAC 20 records that North Sea practice normally limits a lockout to four hours, and that with a three-man bell six hours is workable because the bellman stays dry on every third dive. It also notes that lockouts in other regions are often considerably longer, that divers should be offered a return to the bell for fluids on any lockout over two hours, and that no physiological evidence supports a hard universal limit. Fatigue is the deciding factor.

Decompression. At the end of the job the chamber pressure is slowly brought back to surface. This is the part the game has no equivalent for, and it takes days.

Afterwards. You do not fly immediately. DMAC 07 sets 24 hours minimum before a flight to 2,000 feet and 48 hours before any other flight after a saturation exposure, and calls those minimums rather than targets.

The gas you breathe, and why you sound strange

At depth you are not breathing air. Nitrogen at pressure makes you stupid and oxygen at pressure becomes toxic, so the nitrogen is replaced with helium and the oxygen is cut to a small fraction of the mix. That is heliox, and it is why saturation divers sound like cartoons — a real problem, not a joke. DMAC 28 recommends considering a speech unscrambler specifically because helium-distorted speech gets misheard when it is relayed, which in a medical emergency matters.

Two published gas numbers are worth knowing because they show how the mix is controlled. DMAC 05, which dates from January 1981, suggested that around 2% oxygen in the helium supplied offshore should work operationally between 50 and 150 metres, with a lower percentage appropriate deeper. That looks alarming until you understand that what matters is partial pressure, not percentage: at 150 metres the ambient pressure is sixteen times the surface, so 2% of the mix is roughly a third of an atmosphere of oxygen.

DMAC 04, revised in May 2016, handles the diver's emergency bail-out supply and works purely in partial pressures: a maximum of 1.4 bar oxygen from the bail-out bottle, and a minimum matching the diver's primary mix with an absolute floor of 0.4 bar. The document notes that the 1.4 bar ceiling is more conservative than the depth-based values the Morrison and Reimers equation would give.

Helium also steals heat, which is the reason the next section exists.

Twenty-eight days, and the 182-day year

The hardest number in this trade is a calendar limit, and almost nobody outside the industry knows it.

Source: Diving Medical Advisory Committee, guidance documents, individual revision dates as listed, consulted 8 October 2026.

A 28-day limit is a long way from "complete fifteen levels in a single dive". The exceptional extension that DMAC 21 allows needs written agreement from the contractor's medical adviser, the divers and the supervisors — three separate signatures to add days to a job.

Note also what the 182-day rule does to a career. Even at the maximum, a saturation diver can spend only half the year under pressure. That is one of several reasons the entire world fleet holds only 493 diver berths across 28 vessels on our count, and why this remains a very small profession.

The real hazard list, from the people who write the rules

If you want to know what actually frightens the industry, read what it writes documents about. The game's threats are creatures. The published threats are these.

Cold. The next section is about this, because it deserves one.

Lost bell. A bell that cannot be recovered is the nightmare scenario, and it is planned for with passive insulation, emergency scrubber, and survival stores. The 1981 DMAC thermal stress workshop set a target of sustaining divers in a lost bell for at least 24 hours, with 48 hours as a later goal.

Decompression illness. Real, treatable and career-affecting. DMAC 13, revised December 2022, sets minimum intervals before returning to diving after treatment: 7 days for limb pain or non-specific symptoms, 14 days if there was a recurrence needing further recompression, 28 days for uncomplicated neurological symptoms that resolved after one recompression, and three months for pulmonary decompression sickness or any visual, cognitive, brain stem, vestibular, cerebellar, autonomic or motor involvement.

Infection in the chamber. See DMAC 26. A warm, humid, oxygen-rich steel tube with several people in it for four weeks is an excellent place for microbes.

Seismic airguns. This is the one nobody outside the trade believes. DMAC 12, revised June 2020, reports that incidents showed significant adverse effects on divers at distances up to 27 kilometres from seismic survey operations — far beyond what had previously been recognised. It recommends making all parties aware of planned activity within 45 kilometres, and a joint risk assessment before any simultaneous operations within 30 kilometres. A survey vessel over the horizon is a genuine hazard to a diver in the water.

Sonar. DMAC 06, revised June 2010, lists dizziness, hearing damage, blurred vision, lightheadedness, limb vibration and arm tremor among reported effects, and notes that a helmet attenuates by only about 25 to 30 dB below 500 Hz, so it is no better than a wetsuit hood at those frequencies. For ultrasonic sonar above 250 kHz it suggests a safe operating distance of 10 metres or more, outside the focused beam.

Ships, sound and cold water. That is the real bestiary.

The cold is the monster

This is the section the internet does not write, and it is the truest answer to "what is actually dangerous down there".

Helium conducts heat far better than nitrogen, so a diver breathing heliox loses heat through the lungs as well as the skin. The DMAC thermal stress workshop of March 1981 remains the clearest public record of what that means in numbers, and the numbers are blunt.

Source: DMAC 08, Thermal Stress in Relation to Diving, workshop of 19–20 March 1981, report dated March 1981, consulted 8 October 2026. Figures are as recorded in that report and reflect the equipment of the period.

Read the bell line again. Thirty minutes for the gas inside a bell at 31 bar to drop below the recommended minimum temperature, four hours to reach the temperature of the sea around it. That is the clock that runs in a real emergency, and nothing is chasing you.

The workshop also concluded something that has aged well: that there is no reliable simple index a supervisor can use to decide whether a cold diver is fit for another dive, and that heating needs controlling at the diver rather than at the surface boiler. Both are still live problems.

What actually lives at those depths

The game asks what kind of life could develop at the bottom of the ocean. It is a good question and it has a real answer, which is stranger than the game's.

Sunlight runs out quickly. According to NOAA, light can reach about 1,000 metres in ideal conditions but meaningful light rarely passes 200 metres. The sunlight zone is the surface to 200 metres, the twilight zone 200 to 1,000 metres and the midnight zone 1,000 to 4,000 metres. Saturation divers work in the first zone and the top of the second — so yes, a real diver at 150 metres is working in something close to darkness, lit by whatever the vessel and the helmet provide.

Below that, life does not stop. At hydrothermal vents, where seawater meets magma, water can emerge at over 340°C and does not boil because of the pressure. When these were found near the Galápagos in 1977, researchers found large communities of organisms nobody had seen, living off chemical reactions rather than sunlight. That discovery is the real version of the game's premise, and it is better.

Sources: NOAA Ocean Service, how far does light travel in the ocean and NOAA Ocean Service, how deep is the ocean, both updated 23 September 2026; vessel figures from our own fleet audit, October 2026.

One more figure that puts the game's setting in perspective. NOAA reports that as of April 2026 about 28.7% of the global seafloor has been mapped at high resolution, and that explorers have seen less than 0.001% of the deep-ocean seafloor. The unknown in the game is not invented. It is just not somewhere a person in a suit goes.

If something goes wrong, can you get out?

This is the question that separates the game from the job, and the honest answer is no, not quickly.

In the game, a run ends and you are back. In saturation, you are at the pressure of your storage depth and the only way to surface is to decompress, which takes days. DMAC 31, from March 2013, deals with accelerated emergency decompression and is sobering reading. It notes that many diving manuals contain rapid decompression procedures that are often too slow to be useful. It suggests rates of up to 10 to 20 metres of seawater per hour may be possible with a raised chamber oxygen partial pressure, for divers who have not made an excursion in the previous 24 hours, and 1 metre per minute where an upward excursion is used. Its central advice is to decompress at the slowest rate the emergency timescale allows, and it states that reducing the rate, or stopping and recompressing, is safer than speeding up if things get worse.

That is why medical care happens inside the chamber. DMAC 28, revised January 2024, says plainly that moving an injured diver under pressure to a shore facility is no longer regarded as the most viable option; instead the casualty is stabilised where they are while the vessel makes for the nearest port. It sets concrete requirements: one chamber designated for medical treatment and reachable by any diver within 30 to 60 minutes, a minimum internal diameter of 1.8 metres and preferably over 2.15 metres, a medical lock at least 300 millimetres across, a waist-high bunk that tilts to 30 degrees at head and foot, and a duty diving doctor available at all hours. In the North Sea skilled care may be reachable within one to two hours; elsewhere, it says, specialists may be a long way off.

And if the vessel itself has to be abandoned, the team leaves still under pressure in a hyperbaric lifeboat. DMAC 31 is blunt about the odds: evacuating into a hyperbaric rescue vessel in rough seas with no recovery facility available within 48 hours is likely to carry a risk of fatality. We have a whole article on hyperbaric rescue and evacuation from saturation, and it is the part of the job that most deserves the word horror.

What the internet gets wrong about saturation diving

Searches for this topic turn up the same handful of errors. Here they are, flatly.

"Saturation divers earn $30,000 a month." Figures like this circulate without a source. What can be sourced is narrower and lower. The US Bureau of Labor Statistics' wage data for May 2025 puts employment of commercial divers in the United States at about 4,000, with a median annual wage of US$72,990. The 90th percentile was US$157,790. That occupation code covers all commercial divers, not saturation divers specifically, and most saturation work is paid as a day rate on vessels that are not US-flagged, so the BLS figures are a floor on the conversation rather than an answer to it. We keep what is actually verifiable on our page about what commercial divers are paid. If a figure online has no source attached, assume someone made it up.

"Sat divers go down to 1,000 metres." No. Our own survey of the fleet found the industry clustered at 300 metres, with the deepest rated vessel at 350 metres. Dives far deeper have been done in experimental programmes, but they are not commercial work.

"It is the most dangerous job in the world." It is a hazardous job with an unusually heavy regulatory and medical apparatus around it. We could not find a credible public global fatality rate for saturation diving specifically, and we are not going to invent one. IMCA maintains a safety flash archive — 2,406 entries when we checked on 8 October 2026 — and national regulators keep their own incident records, but no single authority publishes a saturation-diving fatality rate. Anyone quoting one should be asked where it came from.

"You just need to be a good scuba diver." Recreational diving experience is close to irrelevant. Commercial diving is a construction trade done underwater, and the qualifications are separate, legally defined and listed by national authorities.

"Saturation and surface-supplied diving are the same thing with different gas." They are different operations with different equipment, crews, risks and economics. We compare them directly in saturation versus surface-supplied diving.

Is it a real job, and could it be yours?

It is a real job. It is also a small one, and the route in is narrow.

Start with the legal gate. In the UK, anyone diving at work must hold a qualification on the HSE's approved list, which is reissued annually; the current edition is dated 1 January 2026. Here is every closed-bell qualification that list recognises.

Source: HSE, List of Approved Diving Qualifications, dated 1 January 2026, consulted 8 October 2026.

Two things stand out on that list. First, it is six countries. Second, no United States qualification appears in the closed-bell schedule at all. That does not mean American divers cannot work in saturation; it means the HSE list, which is the gate for UK offshore work, does not recognise a US closed-bell certificate. If you are planning a career around a particular school, check which national lists its certificate appears on before you pay anyone.

Then the medical. HSE's MA1, revision 5 of 5 June 2023, is the guide its approved medical examiners use. Its headline thresholds are specific.

Source: HSE, The Medical Examination and Assessment of Divers (MA1 rev5), published 5 June 2023, consulted 8 October 2026. MA1 states that examiners must still make an individual, justified decision.

That VO₂ max band is the part to take seriously if you are young and interested. It is a measure of aerobic fitness, and 40 ml/kg/min is not a trivial number. It is also the one requirement on the list you can start working on today, years before you are eligible for anything else.

Now the market. Our own research across the industry found that only 17 of 876 commercial diving companies run saturation, and that only 5 of the 34 schools in our school directory teach it. Nobody starts in saturation. You qualify as a surface-supplied diver, work, then add a closed-bell ticket and wait for a berth. Our guide to how long it takes to become a saturation diver sets out the realistic timeline, and the piece on what a dive support vessel is like inside will show you where you would actually live.

If you are under 18 and this is the first thing that has ever made you want a trade: swim, lift, finish school, get your maths, and learn to weld or fit pipe on dry land. Every saturation diver was a competent surface-supplied diver first, and every competent diver was a tradesperson first. The game cannot be done at your age. The preparation can.

Sources

1. Roblox — games API, universe 10231678265 (Saturation Diving), consulted 8 October 2026.
2. Roblox — votes API, universe 10231678265, consulted 8 October 2026.
3. Roblox — badges API, universe 10231678265, consulted 8 October 2026.
4. Roblox — Saturation Diving experience page, consulted 8 October 2026.
5. Diving Medical Advisory Committee — guidance documents index, consulted 8 October 2026.
6. DMAC 04 — Oxygen content in open circuit bail-out bottles for heliox saturation diving, Rev. 2, May 2016, consulted 8 October 2026.
7. DMAC 05 — Recommendation on minimum level of oxygen in helium supplied offshore, January 1981, consulted 8 October 2026.
8. DMAC 06 — The effects of sonar transmission on commercial diving activities, Rev. 1, June 2010, consulted 8 October 2026.
9. DMAC 07 — Flying after diving: recommendations, Rev. 2, November 2017, consulted 8 October 2026.
10. DMAC 08 — Thermal stress in relation to diving (workshop report), March 1981, consulted 8 October 2026.
11. DMAC 12 — Safe diving distance from seismic surveying operations, Rev. 2.1, June 2020, consulted 8 October 2026.
12. DMAC 13 — Fitness to return to diving after decompression illness, Rev. 3, December 2022, consulted 8 October 2026.
13. DMAC 19 — The effects of water vapour on diver physiology, Rev. 1, November 1990, consulted 8 October 2026.
14. DMAC 20 — Duration of bell lockouts, Rev. 1, November 1997, consulted 8 October 2026.
15. DMAC 21 — Guidance on the duration of saturation exposures and surface intervals between saturations, Rev. 2, June 2006, consulted 8 October 2026.
16. DMAC 26 — Saturation diving chamber hygiene, Rev. 2, June 2025, consulted 8 October 2026.
17. DMAC 28 — The provision of emergency medical care for divers in saturation, Rev. 3, January 2024, consulted 8 October 2026.
18. DMAC 31 — Accelerated emergency decompression from saturation, March 2013, consulted 8 October 2026.
19. IMCA — D 014, International Code of Practice for Offshore Diving, Rev. 3.3, March 2025, consulted 8 October 2026.
20. IMCA — D 024, DESIGN for saturation (bell) diving systems, Rev. 4, June 2026, consulted 8 October 2026.
21. IMCA — safety flash archive, consulted 8 October 2026.
22. HSE — Diving Approved Codes of Practice (L103–L107), in force 8 December 2014, consulted 8 October 2026.
23. HSE — List of Approved Diving Qualifications, dated 1 January 2026, consulted 8 October 2026.
24. HSE — The Medical Examination and Assessment of Divers, MA1 rev5, 5 June 2023, consulted 8 October 2026.
25. HSE — Diving at work, updated 2026, consulted 8 October 2026.
26. O*NET OnLine — National wages, 49-9092.00 Commercial Divers (BLS May 2025 wage data), consulted 8 October 2026.
27. NOAA Ocean Service — How deep is the ocean, updated 23 September 2026, consulted 8 October 2026.
28. NOAA Ocean Service — How far does light travel in the ocean, updated 23 September 2026, consulted 8 October 2026.
29. NOAA Ocean Service — What is a hydrothermal vent, updated 23 September 2026, consulted 8 October 2026.
30. NOAA Ocean Exploration — How much of the ocean have we explored, updated 20 April 2026, consulted 8 October 2026.

Frequently asked questions