Submerged: A Subnautica Survival Diary – Log 17 | The Descent Continues

Submerged: A Subnautica Survival Diary – Log 17 | The Descent Continues

Platform: Steam Deck
Mode: Survival – No Commentary

Video Entry

Apparently, the answer has been staring me directly in the face this entire time.

I checked my PDA and noticed something I had completely overlooked before: a clue mentioning a Disease Research Facility located 800 metres down near skeletal remains.

I have already been somewhere with skeletal remains 800 metres below sea level.

So naturally, I’m going back.

I take both my orange and purple tablets with me just in case. At this point I’ve learned that alien doors have a habit of refusing entry unless you happen to be carrying the correct glowing geometry.

One More Stop At The Aurora

Before descending, I decide to stop by the Aurora wreckage one more time. I had a feeling I didn’t properly loot it during my last visit.

Turns out I was right.

I found another hole in the hull leading deeper inside and eventually came across a Cyclops Thermal Module.

Very useful timing considering what I’m preparing for.

The Disease Research Facility

Once I reach the skeletal remains in the Lost River, I head left and finally find the Disease Research Facility.

To make this even worse, I realise I could have discovered this place during my previous visit if I had simply paid more attention. The only reason I found it at all was because I had been hunting for Ruby in the area and didn’t want to properly explore the structure without recording it.

Did I scout for an entrance beforehand?

No.

That would have been sensible.

Eventually I locate a way inside and immediately find somewhere to insert one of my alien tablets. The facility powers up enough for me to access alien data terminals, and suddenly several things become painfully clear all at once.

First: there may actually be a cure for the infection I’m carrying.

Second: the facility containing that cure is approximately 1.4 kilometres below sea level.

That is currently well beyond my capabilities.

For now.

While exploring further I recover Ion Cubes and additional alien data. I also learn something I already suspected: I am the last surviving crew member of the Aurora, and the quarantine enforcement platform is specifically preventing infected lifeforms from leaving the planet.

Good thing I didn’t build the Neptune Rocket yet. That would have been an incredibly brief launch sequence.

I also finally learn the true purpose of the Warpers.

They are effectively hunter-killers designed to eliminate infected targets.

Which means every encounter I’ve had with them suddenly makes a lot more sense.

So now I know what happened to the Aurora crew.

And likely what happened to the Degasi survivors too.

The Time Has Come

But now I finally have direction.

The cure exists.

It is below me.

And if I want to reach it, I need to descend another 600 metres beyond my current limit.

Which means the time has finally come.

I’ve spent the last several entries preparing for this off camera: building infrastructure, gathering materials, expanding the base, stockpiling supplies and trying to make sure I don’t descend into the planet completely unprepared.

I return to my larger base, empty out the lockers containing all the materials I’ve gathered and head for the Mobile Vehicle Bay.

I even wait for sunrise because if I’m about to construct giant survival vehicles, I may as well make it look cinematic.

The Prawn Suit

First up: the Prawn Suit.

It still doesn’t have a proper name or colour scheme yet. That sounds like a problem for future me.

But the important thing is that it exists.

And unlike Valentino, it can already reach 900 metres below sea level without immediately complaining about pressure.

That alone makes it valuable.

The Cyclops Problem

Then came the real objective: the Cyclops.

I press the button and immediately get informed that the water is too shallow.

Excellent start.

I briefly consider dragging everything back to the larger base before remembering my original base should still be located in deeper water.

So naturally I load the Mobile Vehicle Bay onto my back, climb into the Prawn Suit and begin walking across the seabed.

It is slower than travelling in Valentino.

But honestly?

Possibly just as entertaining.

Eventually I reach deeper water and try again.

Attempt number two succeeds.

I officially have a Cyclops.

The onboard AI calmly informs me the vessel is designed for a three-person crew.

Unfortunately for the Cyclops, there is only me.

We will adapt.

Preparing For The Descent

Before ending the expedition, I install a MK1 depth module into the Cyclops to improve its diving range.

Eventually it will need a MK2 or MK3 upgrade if I want to reach the 1.4 kilometre facility.

But for now, the next objective is preparation.

I want both the Cyclops and Prawn Suit outfitted as thoroughly as possible before continuing deeper into the Lost River.

I still have no idea what ultimately waits below the planet.

I only know one thing for certain:

I would rather face it prepared.


Continue The Journey

Previous Log: Submerged Log 16
Next Log: Coming Soon
Series Hub: Subnautica Hub


Related Subnautica Content

Submerged: A Subnautica Survival Diary – Log 16 | The Descent Begins

Submerged: A Subnautica Survival Diary – Log 16 | The Descent Begins

Platform: Steam Deck
Mode: Survival – No Commentary

Video Entry

The new base is finally operational.

Honestly, I’m pleased with how it turned out. I had a rough vision in my head while building it, and somehow the result actually resembles what I imagined instead of a collection of underwater tubes held together by panic and titanium.

That said, construction was not exactly smooth. The base developed leaks almost immediately after expansion started, which explains why the walls are now covered in reinforcements. I would love to add more windows eventually, but considering the ocean already tried to force its way inside once, restraint may be the smarter option.

The important systems are online. I’ve got hydroponics running, a water filtration unit producing clean water, and a Gel Sack farm outside. For anyone playing along, once you finally find a Gel Sack, hit it with a knife a few times before harvesting it. The seeds can then be planted in an exterior growbed, saving you from repeated trips into increasingly worrying cave systems every time Aerogel becomes necessary.

The Call From Lifepod 2

During the time spent working on the base, another radio message arrived. I deliberately left it alone until this entry. If I’ve learned anything on this planet, it’s that distress calls rarely improve the situation.

This one came from Lifepod 2.

The coordinates placed it roughly 500 metres below sea level, which is now comfortably within Valentino’s range. Since the last entry, Valentino has received a MK3 depth module, allowing him to descend to 900 metres. I also installed sonar. During testing, it picked up a Reaper Leviathan nearby, so at least now I can detect incoming nightmares slightly earlier than usual.

I still had Lifepod 13 sitting on my HUD as well, so I decided to clear that first. Naturally, I got distracted by wreckage along the way, because apparently I cannot pass abandoned technology without investigating it.

The wreck did not offer much, and neither did Lifepod 13. I suspect I had already visited it earlier and simply forgot to remove the marker. Efficient? No. Consistent? Sadly, yes.

Below 500 Metres

Lifepod 2 was exactly as expected: empty.

No survivors. Just another quiet reminder that everyone else who tried to survive this planet appears to have failed.

While using sonar near the pod, I noticed something else nearby. An opening.

Dark. Deep. Wide enough to continue downward.

With Valentino upgraded and the sonar active, I convinced myself this was a good idea.

That confidence lasted until I saw what looked like an enormous crab with an exposed brain. I briefly considered turning back, but I had already come this far, and apparently that now counts as decision-making.

The deeper I travelled, the stranger the environment became. An underwater river flowed through the cavern, with glowing green fog drifting through the darkness. I scanned what I could and picked up anything that looked useful, because if this planet insists on becoming stranger, I may as well keep stealing from it.

The Waterfall Rule

Eventually I found a waterfall.

Years of gaming have taught me that waterfalls are legally required to hide something, so naturally I investigated.

The passage beyond could not take Valentino with it. It looked like there was breathable air inside, or at least something close enough that I was not immediately dying. Unfortunately, I was also sure I had seen a Leviathan somewhere nearby, along with Warpers moving through the area.

Leaving Valentino outside did not feel great.

I parked him as close as I could and went in anyway.

The Structure Beneath The Planet

Behind the waterfall, I found a giant alien structure buried deep beneath the surface.

I looked for a way to power it, scan it, or interact with it in some useful way, but nothing responded. It just sat there in the silence, which was not comforting.

I returned to Valentino much faster than I entered.

Thankfully, he was still there.

By this point, I was around 800 metres down, and it looked like the route continued even deeper. Before leaving, I found something else: a massive skeleton.

The scan identified it as the remains of a Sea Dragon.

That felt like the planet politely suggesting I leave.

I dropped a beacon to mark the route. I can go further this way later, but not yet. I need the ability to go deeper, and I need more than Valentino if I am going to survive what comes next.

New Targets Unaccounted For: 1

Back at base, another message was waiting.

New targets unaccounted for: 1.

I am assuming that “1” is me.

Which means something knows I exist.

That changes things.

The deeper I go, the clearer it becomes that Valentino alone is no longer enough. If I am going to keep descending into these caverns, I need a mobile base. Somewhere to store supplies, recharge equipment, carry resources, and support longer expeditions far below the surface.

And if something down there decides it wants me dead, I would also like something capable of meeting the problem head-on.

So the time has come.

I said I needed to go deeper.

Now I do.

Which means it is finally time to build a Cyclops and a Prawn Suit.


Continue The Journey

Previous Log: Submerged Log 15
Next Log: Coming Soon
Series Hub: Subnautica Hub


Related Subnautica Content

Submerged: A Subnautica Survival Diary – Log 6: The Sunbeam Falls

Platform: Steam Deck
Vehicle: Seamoth “Valentino” — maiden voyage
Objective: Reach the Sunbeam landing site
Status: Stranded indefinitely

“Turns out the cavalry isn’t coming — mostly because a giant alien cannon just vaporised them.”

With my Seamoth finally ready — Valentino’s first dive into open water — I headed toward the Sunbeam landing site. For once, I actually felt hopeful. Then the radio crackled again. Another distress call — this time from Lifepod 19. They could wait. If they were still alive, they’d understand. I had a rescue ship to meet.

The Island of False Hope

Reaching the site, I was greeted by something I definitely didn’t expect: a massive Alien structure that screamed “DO NOT ENTER.” A shimmering forcefield blocked the main door, and every instinct told me I was way out of my depth — both literally and metaphorically.

I parked Valentino nearby and started exploring on foot. The island itself felt eerily empty, save for the alien architecture humming with quiet menace. It wasn’t long before I found strange purple artifacts and terminals that told stories of technology way beyond anything I’d ever seen. One room even held a doomsday device — thankfully, deactivated.

The Infection Revealed

Eventually, I found what looked like a control terminal. My PDA hinted it might shut down the “cannon” perched above. I scanned it, ready to save the day — only for the machine to stab me with a robotic needle and announce, in the most clinical way possible: “Infection detected. Cannot deactivate.”

I scanned myself. Sure enough — infected. The planet was under quarantine, and I was part of the problem now. The only way out? Find a cure. Deeper in the ocean. Because of course it couldn’t be simple.

Fireworks at Dusk

With nothing else to do but accept my new membership in the “Forever Stranded” club, I returned to Valentino and made for the landing site once more. Another radio message came through — ignored. My focus was fixed on the sky.

And then, it happened. The Sunbeam dropped out of orbit, descending toward the island. A blinding green light surged from the alien structure. The cannon fired. And just like that, my rescue became a fireball.

I stood there in stunned silence, the sky lit up with debris and despair. The PDA chirped calmly in my ear, reminding me that rescue was “no longer an option.” Thanks, PDA. Really helps.

Guess I’d better make myself comfortable. It’s going to be a long stay on 4546B.

Video Log

Watch the Sunbeam’s final moments here once the video is live.

Continue the Journey

← Log 5.5: The Waiting Game |
Log 7: Coming Soon

📢 New Series Launch Alert!

🌊 Submerged: A Subnautica Survival Diary Begins This Week

It’s time to dive in — our newest survival series officially launches this week, and we’re starting exactly where you’d expect: falling out of the sky in a flaming escape pod and into an alien ocean full of fish with bad attitudes.

Day One of Submerged is coming this week, with more entries arriving weekly. Follow along as our unfortunate multiverse survivor tries to make sense of a PDA full of blueprints, a lifepod that’s already on fire, and a world where hydration comes from bleach.

  • 🔧 Expect chaos. Expect crafting. Expect at least one poorly timed encounter with a Reaper Leviathan.
  • 🚀 All played on the Nintendo Switch, because survival is better when it’s portable.

And if you’re just joining us from The Long Dark, Skyrim, or Stranded Deep — welcome! Hope you brought your flippers.

🌊 Announcement: Subnautica Will Be the Next Series!

While my Argonian my have fallen, it’s time to look ahead—and downward. Specifically, into the ocean.

I’m excited to announce that Subnautica will be the next full series featured on Survivor Incognito! The series will officially begin in a few weeks, once I’ve reacquainted myself with the controls (because I apparently forgot how to swim, build, and breathe). It’ll fall under the same permadeath-flavoured survival approach as the others, with a few sea-salty twists.

In the meantime, I’ve already launched the Subnautica Maps Page to help new players, returning survivors, and confused PDA AIs alike. Bookmark it, share it, or yell at it when you get lost near the Aurora again.


🎉 Celebrating 1,000 Views!

Also, a massive thank you to everyone who’s visited the blog—Survivor Incognito has officially passed the 1,000 views milestone!

To mark the occasion, I’m doing something a little different… something a little more classic horror. While I’m still getting my bearings with the controls again, you can expect a familiar mansion, limited saves, and enough tension to make a zombie blush. 🧟‍♂️

More on that very soon.


More updates coming soon, including the official Subnautica start date and a look at what else is on the blog horizon.

Stay afloat,
Survivor Incognito

🗺️ New Page Live: Subnautica Maps Are Here!

Lost in the Kelp Forest again? Swam into the Dunes thinking it was the Grassy Plateaus? Yeah… me too.

That’s why I’ve just launched a brand-new Subnautica Maps page on the blog! It features:

🧭 A direct link to the incredibly detailed interactive Subnautica map

🖼️ Gorgeous static region maps from RocketSoup.net

🧪 Some helpful blurbs and probably too much sarcasm

Whether you’re a new diver or a returning survivor who still forgets which way the Aurora crashed, this page is your new best friend. Or at least your most reliable one, since bladderfish don’t offer much conversation.

👉 Click here to check out the new Subnautica Maps page.

Stay buoyant out there.


Survivor Incognito
Still unsure which way is north

Blog at WordPress.com.

Up ↑