1 - 20 of 74 Works in Alternate Universe - Subnautica Fusion
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Coming Forth By Day by IGoByHeart
Fandoms: Yu-Gi-Oh! Duel Monsters (Anime & Manga), Yu-Gi-Oh! - All Media Types
08 Dec 2025
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Summary
Atem, Crown Prince of Khemet, a world only recently introduced to the wider universe. On the way to an arranged marriage to an alien princess he's never met. Hoping to save his people.
Yugi Muto, head engineer of the Gandora and grandson of the captain. The ship his home, the crew his family.
4546B, an unexplored ocean planet.
Two survivors. One lifepod.
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Darker Than Water| Space Mer Sun and Moon Fic | Sci-Fi/Subnautica Security Breach x Reader Fic by FatherRuss_69
Fandoms: Five Nights at Freddy's
30 Nov 2025
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Summary
You've never been one for deep space. The idea of floating endlessly in the dark, nothing but a suit and a prayer between you and the void, has always made your skin crawl. But when the ship began to fail and the wormhole loomed, you didn’t hesitate—you fixed what no one else could, knowing it meant you wouldn’t make it back.
You expected death. Instead, you were pulled into a part of the universe no one's ever seen. And staring at you from the edge of the stars were two glowing creatures—half celestial, half nightmare—who were far too eager to keep you. Would your crew save you? Or would you find yourself stuck in a place Darker Than Water?
Series
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Five Nights at Freddy's Drabbles and OneShots by BlobDude
Fandoms: Five Nights at Freddy's, Rebornica AU-FNaF, Five nights at flirting
22 Nov 2025
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Summary
This book will contain SPOILERS and a SHIT TON of headcanons for the game Five Nights at Flirting, a Five Nights at Freddy's night guard dating simulator. It's actually really interesting, it has neat art as well, and is free to play.
Death, injury, blood, gore, and sexual themes are going to be common topics, but I'll try my best to tag each chapter with the appropriate warnings, and if you need me to add any, please let me know.
The Author of this book is NOT responsible for readers ignoring the tags, those who need a tag and point out that I need to add one do not count.
Viewer Discretion is advised.
Oh, and please, don't request things from me... I can't guarentee I'd even actually finish it if I do write it.
(EXTREMELY SLOW UPDATES!!)
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Hidden in the Depths by Jedi_Raptor
Fandoms: Video Blogging RPF, Subnautica (Video Game), QSMP | Quackity SMP
18 Nov 2025
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Summary
The sight that greeted him was equally as breathtaking as it was terrifying.
Deep blue water surrounded his pod, which had thankfully triggered the detection system and had made his pod use it's floating devices. The colors looked familiar, almost normal. Nothing but vast ocean, no islands, no distant shores. Nothing. It almost seemed like he was just stranded in an ocean on earth, if it weren't for the giant planet he could clearly see in the sky. Either this water planet was an orbiting moon to that large red planet, or that was a very large moon orbiting this planet.
But that wasn't even the worst of it all. Because a couple miles away, the remains of the large exploded ship sat half submerged in the water, lifeless and silent. Some fires were still burning, now fueled by the new oxygen this planet provides. It stung, seeing it like this. It would have been his only way home, his only way of calling for help. But he doubts that any of the radio systems were still working. No long range communication to other ships or even a space station or two. And the systems of his own pod were fried too.
He was completely stuck.
~ currently updates 1-3 times a month ~
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Go Among the Stars by spacedogfromspace
Fandoms: Star Trek, Star Trek: Alternate Original Series (Movies), Subnautica (Video Game)
08 Nov 2025
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Summary
Nine people are aboard the Enterprise on route to a shipyard when they decide to take a detour to survey a nearby planet. What should have been a simple scan of a planet turns into a disaster as the Enterprise is shot out of orbit by an unknown weapon, and her passengers have no choice but to ride escape pods down into the waters of Planet 4546B.
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Pressure Threshold by dissapointment_666
Fandoms: Subnautica (Video Game), Video Blogging RPF
25 Oct 2025
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The Aurora was supposed to be just another ship, another mission, another day in deep space. That all changed when it fell.
Now, seven survivors are stranded on an ocean planet, surrounded by alien waters teeming with life—some wondrous, some monstrous. With no way home, no rescue on the horizon, and the rules of their own biology beginning to shift, the crew must fight to survive.
But the deeper they go, the more they change.
Somewhere beneath the waves, something is waiting. Watching. Calling.
And the deeper they dive, the harder it is to remember what it means to be human.
Series
- Part 1 of We Who Remain
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Transalanticism by SpindriftalOfTheKnight
Fandoms: 原神 | Genshin Impact (Video Game), Subnautica (Video Game)
12 Oct 2025
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Summary
Kaveh and Alhaitham but if I randomly threw Subnautica at it very aggressively.
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your ghost i will gladly bear by proximally
Fandoms: The Murderbot Diaries - Martha Wells
23 Sep 2025
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Summary
It’s a routine manoeuvre, a simple slingshot around the planet to get a better approach angle on its moon—
(Far below you, occluded by the curve of the globe, the Quarantine Enforcement Platform activates.)
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Welcome to The Safe Shallows by Midnight_fire00
Fandoms: Welcome Home - Clown Illustration, Subnautica (Video Game)
09 Sep 2025
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Summary
A Subnautica AU of Welcome Home
Y/N has just crash landed onto an alien planet and has just barely managed to survive after escaping their ship. Thankfully, they landed in the safe shallows, where a friendly face greets them. Can Y/N trust this charming fish, or will they continue to refuse to leave their pod until it's too late.
This story will follow the rough storyline of Subnautica, the main plot still following the virus and the planet being on Lockdown. However, there will the unique characters added. Some of the events that take place in the original game will not take place in this AU, however other plots will replace them, as you will see :)
Series
- Part 3 of Welcome Home fics
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The Lethal Ascent Curve by Wow_a_Spoon
Fandoms: Sonic the Hedgehog - All Media Types, Subnautica (Video Game)
04 Sep 2025
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Two men are trapped on an alien ocean planet with nothing but wreckage and regret. Shadow survived two years alone until Sonic washed ashore, who is still bleeding memories of a wife who'll never know he lived.
The deep teems with monsters that hunt through waters below. But Sonic and Shadow?
They become worse monsters.
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Toxic Sonadow Subnautica AU. Heed the tags.
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are you certain whatever you're doing is worth it? by johnnyguitar
Fandoms: Hermitcraft SMP, Life Series | 3rd Life SMP Series, Subnautica (Video Game)
27 Aug 2025
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Summary
Ten years after his brother's disappearance, Grian manages to get himself and a handful of his crew onboard the Aurora as it performs a slingshot maneuver around Planet 4546b, in the hopes of finally discovering what really happened. When the ship crash-lands into the ocean, they find themselves stranded and doing everything they can to keep themselves alive.
(Meanwhile, Jimmy turns his back for five seconds and all of a sudden there's a giant smoking hunk of metal leaking radiation into his crater. What gives!)
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Purpled’s 99.9% foolproof guide to stealing spaceships by Book_lover9000
Fandoms: Dream SMP, Minecraft (Video Game), Video Blogging RPF, Subnautica (Video Game)
14 Jun 2025
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If one were to ask Purpled what he’d call his job, he’d probably say something between bounty hunter, spaceship stealer and just general space outlaw
He needed the money and space ships were always in high demand, no more explanation needed in his opinion.
And a ship like the Aurora?
A payday for the ages.
Now only to get the crew out of the ship and onto this backwater waterworld...
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Summary
Another rumbling song called out from the depths, sending a shiver down Wriothesley’s spine. The lights of the submersible flickered and died, the power fully cutting out.
“Power failure,” S.I.G.3.W.I.N.N.E. crackled, her voice partially obscured by static. “Stand by for emergency power supply activation.”
A shadow passed below the ship, and Wriothesley risked a glance downwards towards the depths of the canyon.
He really wished he hadn’t.
After his spacecraft crashes on an alien planet primarily made up of oceans, Wriothesley is left stranded with only an artificial intelligence module called S.I.G.3.W.I.N.N.E. to keep him company. As curiosity draws Wriothesley deeper into the waters of the ocean planet, he discovers something monstrous lurking in the depths.
Series
- Part 6 of Raven_Will's MerMay
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Summary
He stares at her. “Courtney, we’re at the bottom of the ocean.”
“That’s why we need the oxygenator, Duncan.”
“So you want me to swim out there, where it’s dark as fuck, and detach it? In, what, thirty seconds?”
“You can’t hold your breath longer than thirty seconds?”
“I’ve been smoking a pack a day for the last twelve years. Do the math.”
[a subnautica au]
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Stranded but United by Crimson_Jahseph
Fandoms: Hololive (Virtual Streamers), Subnautica (Video Game)
09 Mar 2025
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Summary
Amelia crash lands into Planet: 4546B. Being stranded from her friends. She has to survive long enough to either find the others or they find her before the planet is ought to get her.
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Zenith Eternum Emergency Voice Logs & Distress Calls by the_fox_den
Fandoms: Subnautica (Video Game), Original Work
02 Jan 2025
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The following voice logs and journal entries were recovered from the Caligo-4 rescue mission. Some data may be corrupted or missing due to interference from the planet’s atmosphere and/or creatures.
Any public distribution of these logs is highly illegal and will be punishable by Eternia and the law.
Series
- Part 1 of Caligo-4
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Detroit: Become Subnautica by demure_raven
Fandoms: Subnautica (Video Game), Detroit: Become Human (Video Game)
02 Nov 2024
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Gavin Reed did not board a giant spaceship to do anything other than act as the head of security and maybe play around in the anti-gravity chambers every now and then. Crashing on a new planet was never on the itinerary, nor is scavenging said (abandoned? to be determined) planet in an effort to survive against a foreign waterborne virus on a world that is entirely covered by fucking water.
He's just a security guard for gods' sake.
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19- "Is there anybody alive out there?" by SpiritsShackled
Fandoms: Re-Animator (Movies - Combs), Subnautica (Video Game)
19 Oct 2024
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Summary
Herbert manages to fix the radio and a message from another lifepod arrives.
Series
- Part 19 of Whumptober 2024
- Part 2 of Re-animator X Subnautica
- Language:
- English
- Words:
- 1,176
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 56
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17- Shipwrecked by SpiritsShackled
Fandoms: Re-Animator (Movies - Combs), Subnautica (Video Game)
18 Oct 2024
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Summary
Dan doesn't like the ocean.
Series
- Part 17 of Whumptober 2024
- Part 1 of Re-animator X Subnautica
- Language:
- English
- Words:
- 591
- Chapters:
- 1/1
- Kudos:
- 7
- Hits:
- 85
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There's and Up (and We can't reach It) by LuneAzure for Jedi_Raptor
Fandoms: QSMP | Quackity SMP, Subnautica (Video Game), Video Blogging RPF
25 Aug 2024
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Summary
His fingers felt cold against the metal of the bars. Standing at the top of the ladder, looking up. The light bent in murky waves, rolling over the glass once, twice, rocking back, always changing. If he squinted enough, he could make out little spots of white dancing far, far above them. The world through the glass looked dunked in translucent green, maybe blue.
He swallowed dryly around the knot in his throat, raising shaking fingertips to the cold glass surface.
The edges of the glass felt just slightly wet with single drops of water rolling down to beyond his sight in between the metal plates."Is someone out there?"
Cellbit turned his head, feeling each last droplet of warm dripping from his face to somewhere in the floor.
Pac stared at him, dreading the answer.
And he stared back.or; the aftermath of the 'Q.S.M.P. 04' ship exploding, told from another perspective, until reunion.
or, or; Cellbit and Pac in a pod, what will they do?(Side story to "Hidden in the Depths" by Jedi_Raptor)
(UNFINISHED)