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

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Series Hub: Subnautica Hub


Related Subnautica Content

Submerged: A Subnautica Survival Diary – Entry 15: New Horizons, New Problems

Submerged Entry 15: New Horizons, New Problems

Platform: Steam Deck
Game: Subnautica

Video: Lifepod 7 expedition, Cyclops breakthrough, and selecting the new base location (no commentary)

The first thing on today’s agenda was finally listening to the radio message I had completely forgotten about during the last entry. The signal came from Lifepod 7. The message itself was not exactly precise, but it did give me something useful to work with: approximately one kilometre from the stern of the Aurora, around 200 metres deep.

Valentino could reach that depth without too much trouble. The bigger issue was everything beyond it. If I wanted to keep pushing deeper into the ocean, I was going to need to improve the Seamoth’s depth capabilities properly.

Which meant another trip to the Jellyshroom Caves.

Back Into the Caves

By this point I know the route into the caves well enough that it no longer feels completely alien, although I still would not describe the place as welcoming. Giant glowing mushrooms, abandoned Degassi structures, and the general sense that the entire biome wants to swallow you whole does tend to ruin the atmosphere slightly.

While collecting Magnetite, I noticed a PDA I had somehow missed previously. The logs mentioned another Degassi base deeper within the caves, roughly 250 metres down.

Conveniently, that depth was perfect for Valentino.

Naturally, I went looking for it immediately.

The base itself was partially abandoned, partially destroyed, and still somehow more organised than anything Alterra has left me with so far. I moved through the structure scanning and looting whatever I could find. Amongst the debris were fragments for a Nuclear Reactor, which is potentially useful later, but the real discovery was something else entirely:

A Water Filtration Machine.

That is a massive upgrade for long-term survival. The idea of having a permanent source of clean drinking water inside the base changes things considerably.

Unfortunately, the universe immediately balanced this optimism by informing me the machine requires Aerogel to construct. I still have absolutely no idea how to make that.

So for now, the Water Filtration plans have been pushed onto the increasingly large “future problems” list.

The Stalker Tooth Problem

Returning to base, I turned my attention toward upgrading Valentino properly. The MK2 Depth Module required Enameled Glass, which meant gathering Glass and Stalker Teeth.

Quartz was easy enough to collect. Stalker Teeth were another matter entirely.

At first the Scanner Room refused to cooperate, so I switched the scan to Metal Salvage instead, figuring I could track the Stalkers themselves and wait for a tooth to drop naturally while they played with the scrap.

This approach did not work.

I tried patience. I tried following them around. I even tried encouraging the process slightly more aggressively by ramming them with Valentino and stabbing them with a knife.

Still nothing.

At this point I briefly convinced myself I probably needed a Stasis Rifle for the whole process and headed back toward the Scanner Room in defeat.

Then I noticed it.

The Scanner Room could scan directly for Stalker Teeth.

Suddenly the entire situation became significantly easier.

I switched the scan immediately, headed back outside, and found a tooth almost instantly. Apparently the solution to my problems was simply reading the Scanner Room properly instead of behaving like an underwater caveman for twenty minutes.

Valentino Goes Deeper

With the final materials gathered, the MK2 Depth Module was finally completed and installed into Valentino.

Maximum operating depth: 500 metres.

That is a very significant improvement over the previous 300 metre limit. The deeper parts of the planet suddenly feel far more accessible now, which is either excellent news or a terrible idea.

Probably both.

Lifepod 7

With Valentino upgraded, it was finally time to investigate Lifepod 7 properly. I checked the coordinates again and began making my way toward the stern of the Aurora.

The closer I moved toward the wreck, the more careful I became. I wanted to search thoroughly without drifting too far into open water, particularly considering what lives around the Aurora.

Unfortunately, the local Reaper Leviathan decided to introduce itself anyway.

The thing appeared out of nowhere and chased Valentino for a short distance before somehow losing interest. I still do not entirely understand how we escaped that encounter intact, but I was not about to question my good fortune.

And then, almost immediately afterwards, I saw something far more important resting on the seabed.

The final Cyclops engine fragment.

After all this time, the Cyclops blueprint was finally complete.

Which means I now have another vehicle to eventually construct. More importantly, I now have another vehicle that will eventually require a name.

The Lifepod and the Doll

Eventually I found Lifepod 7 itself, carefully matching the surrounding terrain against the photograph I had been given. Valentino had taken a beating during the earlier encounter, so I stopped briefly to repair the damage before entering the pod itself.

Truthfully, there was not much left inside worth salvaging.

There was, however, one unusual discovery.

A strange doll sitting quietly within the wreckage.

I could not pick it up directly, but I was able to scan it. After checking my blueprints later, it appears I can now build my own version of it.

Something about the doll felt strangely familiar though. It reminded me of someone from another underwater disaster involving another submarine.

If memory serves correctly, things did not end particularly well for them either.

New Base Location

Before heading home, I spent some time surveying the surrounding area carefully. The more I explored near the stern of the Aurora, the more obvious something became.

I need a second base.

The original Mushroom Forest base is still serving me well, but operations are slowly moving further and further away from it. The deeper I push into the planet, the more useful a forward outpost becomes.

Eventually I found the spot I was looking for.

Close enough to the Aurora to support further expeditions. Far enough from the deeper drop-offs to remain manageable. Dangerous enough to feel like a terrible idea.

Perfect.

I dropped a beacon into the seabed and gave it a name:

New Base Location.

That is right.

I am building a new base.

Continue the Journey

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Submerged: A Subnautica Survival Diary – Log 9: Beacons, Blueprints, and a First Proper Home

Submerged Log 9: Beacons, Blueprints, and a First Proper Home

Platform: Steam Deck

Video: Beacon run, Mushroom Forest scavenging, and first base module (no commentary)

When you hit a brick wall in Subnautica, the game doesn’t give you a hint. It gives you more ocean.

I’ve stalled out. Upgrades are half-finished, blueprints are dangling just out of reach,
and my “plan” has become a list of things I’d like to do once I stop being poor in titanium.
So I do the only thing left: explore.

My memory is decent, but this planet is an endless blue maze, and I’m done pretending I’ll remember
where anything is. It’s finally time to start using beacons properly.

Beacon Therapy (Mushroom Forest Edition)

I craft a beacon, head out to the Mushroom Forest, and deploy it the second I arrive.
The logic is simple: if the radio nudged me here once, there’s probably something useful nearby.
I name the beacon, mark the spot, and start searching with actual purpose for once.

The theory pays off fast. I find another piece of the Cyclops puzzle, and — more importantly —
the second Moonpool fragment.
That one moment flips the entire run. Base building isn’t a “someday” thing anymore.
It’s now.

Side Loot: Shale Outcrops and Surprise Diamonds

Since I’m already here (and my sense of direction has clearly been outsourced to a beacon),
I start checking what this biome actually offers.

The big win: diamonds in shale outcrops.
That’s the kind of detail Future Me will be grateful for, assuming Future Me survives
long enough to remember why diamonds matter.

Prep Work: Pin Recipes, Build the Tool, Commit to a Location

I head back to the lifepod and start doing the boring-but-important part:
preparation.
I pin the recipes I know I’ll need, craft the Habitat Builder,
and finally accept that I need a home that isn’t a floating tin can with a radio.

Of course, the radio fires off another distress signal mid-planning.
I add it to the list. I already know how that story ends: no survivors,
just another location stamped onto my growing collection of disappointment.

Base Site Picked (Mostly): “Somewhere Between Here and There”

I settle on a spot roughly halfway between my lifepod and the Mushroom Forest.
In theory, it’s a sensible compromise: close enough to my old “base” for convenience,
close enough to the Mushroom Forest for materials and fragments.

In practice, I’m eyeballing distance in open ocean, which is basically the same
as saying I chose the location by vibes.

I place the first module and immediately run into the first real base problem:
power.
No power means no oxygen inside, which is a fun twist for something that is supposed to be a shelter.

Power Decisions: Solar Wins (For Now)

I weigh up options and land on solar. It’s not glamorous, but it’s doable right now,
and “right now” is the only timeframe this planet respects.

I do some early prep for the Moonpool materials while I’m thinking about the future,
but the titanium math is brutal.
I’m going to need a lot more, which means a dedicated scrap hunt is officially coming.

Hatch Installed, Oxygen Not Included

I craft a hatch so I can actually get inside my new base, but until I get power online,
it’s basically a room-shaped hazard.
No power, no oxygen — and my base is currently doing a great impression of a death trap.

I do have an idea for how to work around that if I need to,
but first I want to solve the problem properly.

Radio Upgrade: No More Lifepod Commuting

One small quality-of-life win: I get a radio set up at the base-in-progress.
That way, I don’t have to keep swimming back to the lifepod every time the game
decides to hand me another “go here” message.

I also keep the Seamoth parked close by.
It’s doing double duty as a safety net and a temporary beacon until I can get a second
beacon made specifically for the base location.

Solar Online: First Breath in the New Base

Once the solar panel finally goes up, everything changes.
I step inside my newly powered base and take the first proper breath of “this might actually work.”

It needs a lot of work. It’s barely more than a shell.
But it’s mine, it’s powered, and it’s a start.
Temporary home or not, it’s the first thing on this planet that feels even slightly under control.

Continue the journey:
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