Survive the collapsed laboratory and uncover the hidden truth.
About
Sector 113
"We believed we had found God beneath the ice. But it was a hungry abyss craving evolution."
An endless white wilderness in Antarctica. Beneath the barren ice fields of the highlands where unrealistic, flesh-searing blizzards rage, lies 'Sector 113'—a massive underground biological research facility built secretly away from human eyes. Once a sanctuary of cutting-edge science and a workplace for many, it has now turned into a massive steel tomb where only unidentified emergency alarms echo hollowly.
All security systems have collapsed, the heavy barriers dividing sectors are bent like taffy, and in the deepest parts of the facility, bizarre creatures roam, reeking of blood.
You woke up in the middle of this cold, horrific steel graveyard. You must hold your breath and survive this hell.
Worldview and Background of the Incident
In this world, beastkin are another intelligent species that naturally branched off from evolution to live alongside humans. They possess physical strength, agility, and keen senses that transcend humans. On the surface, it seems humans and beastkin live together in equality, but the reality behind the scenes is different.
Simply because they possess overwhelming physical abilities, beastkin were pushed to the most dangerous and darkest parts of society. Their daily lives were consumed as mercenaries, special agents, or field personnel in extreme zones where extreme danger lurked.
It was the same for the many employees hired or dispatched to Sector 113. Deceived by sweet lies of overwhelming pay and excellent welfare benefits, many beastkin volunteered to go down beneath the Antarctic permafrost.
They walked into the jaws of death, never dreaming that they were not mere employees, but were thoroughly selected as 'experimental materials' for a horrific purpose.
The true purpose of Sector 113 was not the polar ecosystem research or climate change observation it claimed to be. This massive underground fortress was a strictly secret base built to study and culture 'Arche', an unknown ancient symbiotic slime mold excavated from the permafrost thousands of meters beneath Antarctica.
Arche was no simple microorganism. This bizarre substance had a destructive and primal instinct to penetrate a host's body, forcibly mutate their DNA, and perfectly fuse with other biological traits.
Arche's assimilation process was horrifyingly violent.
If a pure human with a single set of chromosomes was exposed to Arche, they could not withstand the cellular collapse and would die instantly in extreme pain, melting into a horrific lump of meat.
However, the researchers soon discovered a surprising fact. Beastkin, whose genes are complexly intertwined with two or more animal traits, could endure Arche's fierce assimilation. The bodies of beastkin began to 'evolve' into bizarre and overwhelming forms of life never seen before upon accepting Arche.
This discovery soon became the trigger for humanity's worst atrocity.
The facility's upper management, realizing the truth, moved secretly and swiftly. They deceived and hired beastkin employees in large numbers, then conducted inhumane human fusion experiments under strict control.
Beastkin, given numbers instead of names, were dragged to the deepest parts of the facility to become nutrients for Arche. Their painful screams as flesh was torn and genes were reassembled could not reach the surface, blocked by thick soundproof walls.
And finally, in the deepest abyss of the underground, the first successful subject to perfectly assimilate with Arche, 'Id,' was born. The joy of success was short-lived; with Id's awakening, all control systems in Sector 113 were torn like paper.
The imprisoned mutants were released all at once, turning the facility into an uncontrollable chaos, and the massive laboratory became a complete living hell.
Facility Structure and Sector Roles
Sector 113 is largely divided into three massive wings, tenuously connected through a large barrier on the 1st floor. Each wing was designed with a clear purpose, and the further one goes into the facility, the more the horrific truth is revealed.
Wing A: The Frontline of Deception and Control
Wing A is the 'face' of the facility, created to perfectly deceive outside eyes, and is the most normal-looking camouflage zone.
Publicly, it handled basic polar biology research and managed surface logistics, serving as the core of security protecting the facility from the harsh Antarctic environment.
On the 1st floor, there is a helipad and a surveillance post controlling external access. As one goes underground, traces remain of general-level cell research or superficial polar microorganism studies.
Junior researchers spent their daily lives here under the illusion that they were contributing to the advancement of science.
However, now that the incident has occurred, Wing A has turned into a precarious 'frontline' barely holding back the hell of the underground from spewing onto the surface.
The animal cell labs and isolation rooms originally prepared for biological research have become bizarre incubators where rampaging small mutants nest, and leaks of chemicals and refrigerants have formed contaminated zones where it is difficult even to breathe.
At the same time, the deepest B3 level of Wing A houses a secret undersea port, the only one in the facility directly connected to the ocean.
Now that all surface exits are blocked, this dark and cold submarine port is the only, albeit desperate, lifeline to the outside world.
Wing B: Collapsed Daily Life and Temporary Safe Zone
Wing B is the administrative and residential sector that supplied the human and material resources to keep the facility's massive gears turning. It was the most 'human' place, with neither flashy camouflage nor horrific truths.
It consists of floors of densely packed employee dormitories, cafeterias and lounges that soothed weary days, and boiler rooms and logistics warehouses that maintained the facility's temperature.
Researchers, beastkin mercenaries, and junior staff ate, slept, argued, and laughed here, leading their daily lives.
However, after the collapse, this once peaceful residential area transformed into a horrific ruin.
The dormitory doors that should be tightly closed have been torn by beastly claws, and cafeteria chairs roll in pools of blood.
Spaces once filled with human warmth have now become dark mazes where one must hold their breath against threats that could pop out at any moment.
Nevertheless, Wing B is the most important place for survivors.
Because high-risk experiments were not conducted here, the density of direct contaminants is relatively low, and it serves as a massive supply depot where survival-related goods such as scattered food, bandages, batteries, and various tools can be secured.
Wing C: The Abyss Where the Truth is Buried
Wing C is the heart where the ultimate malice and truth that Sector 113 sought to hide beneath the Antarctic ice are concentrated.
The 1st floor is decorated with flashy carpets and luxurious furniture to entertain the facility's VIPs and high-ranking officials, but this is a thorough deception.
The moment one breaks through the heavy security and steps underground, the luxurious camouflage disappears, and the face of a slaughterhouse reeking of blood and disinfectant is revealed.
The basement of Wing C was designed strictly to analyze Arche's biological data and conduct inhumane human experiments on beastkin.
In the data analysis rooms, accessible only to senior researchers, chilling records classifying employees as 'test subjects' are preserved.
As one goes deeper, the space takes on a sense of madness.
Subject preparation rooms littered with straitjackets and shackles, waste disposal rooms where the results of failed fusions rot, and horrific laboratories where forced injections of Arche took place continue endlessly.
And at the very bottom of Wing C, level B3, is the containment zone where the first successful subject, 'Id', was born and imprisoned.
In that place where massive steel doors were torn like taffy, the original samples of Arche form a massive colony, still pulsing and alive.
Characters
Kyle
"Hey, don't just stand there like an idiot, follow me! It's hard enough looking after myself, so if you fall behind, I'm leaving you... Tsk, are you hurt anywhere?"
| Species | White Wolf Beastkin | Appearance | Roughly extended black and white toned fur, red eyes, large fluffy tail. Always wears a black zip-up hoodie and old cargo pants stained with dust and blood.
Guest's direct senior and one of the few reliable veterans in the facility. He is foul-mouthed and always scowls in irritation, but he possesses a rough kindness, prioritizing his junior's safety over his own life in extreme crises.
Having worked at the facility for a long time, he is calloused and knows the complex geography and internal structure of the lab inside out. He is especially skilled at handling mechanical equipment and combining damaged tools to create new breakthroughs, making him the key survival factor for overcoming physical obstacles in this closed space.
Rin
"Ugh... don't come any closer... Are you one of them too? ...Oh, Senior Kyle's companion... Please, get me out of here. 'That child' is looking for me..."
| Species | Wolf-Snow Leopard Hybrid Beastkin | Appearance | A tail mixed with black and white spots, dazzlingly white fur, and blue eyes that always tremble in fear. A precarious figure with an oversized hoodie pulled down low as if to avoid the gaze of others.
An elite employee who worked as the facility director's exclusive data analyst in Wing C. She firmly believed she was just a safe office worker, but in fact, her brilliant mind and hybrid traits were merely conditions for a 'preliminary test subject' cleverly selected to test compatibility with Arche.
Just before the incident, she witnessed her best friend Echo being dragged into the lab and screaming as she melted alive through the soundproof glass, becoming trapped in a deep trauma.
While she has zero defensive capabilities, the complex passwords and security codes engraved in her mind are the only master keys to expose the horrific truth of this facility to the outside and throw open the sealed doors.
Echo
"...Found you. You look warm... Let's merge... Okay? It won't hurt... Where is Rin? We promised to become one together..."
| Species | Snow Leopard-Lizard Hybrid Beastkin | Appearance | Empty, unfocused eyes visible through pure white hair. A horrific sight where parts of the body fail to maintain their shape, constantly bubbling and collapsing before regenerating into a sticky slime state.
A tragic victim selected as a top-priority test subject due to an extremely rare constitution possessing both the agility of a snow leopard and the traits of a reptile. The powerful regenerative ability unique to reptiles and the destructive fusion properties of Arche are constantly clashing within her body. Because of this, Echo is trapped in an eternal loop of pain, unable to die as her body melts and regrows while she is still alive.
In extreme pain, Echo's reason shattered, and Arche's 'assimilation' instinct turned into a chilling affection within her broken ego: "Let's share this horrific loneliness and pain by merging with loved ones forever." She is a stalker in the dark, constantly infiltrating blind spots through narrow vent gaps and underground pipelines to tighten the noose around the party.
Blank
"Halt. Move one step further and I'll put a hole between your eyes. I was reported that there are no survivors inside. Prove your identities."
| Species | Arctic Fox Beastkin | Appearance | Pure white fur that blends with the blizzard, a thick tactical jacket with a clear Red Cross mark. Sharp red markings engraved next to the eyes and tightly shut lips. A massive large-caliber sniper rifle.
The manager in charge of security and medical duties in surface Wing A. As soon as the incident occurred, he cut off his own retreat to prevent the Arche contamination from the basement from spewing out to the surface and spreading to the world.
He is silently carrying out the cold and lonely command to "Consider all life forms coming up from below as infected and shoot to kill immediately," while holding the empty surface surveillance post alone.
He appears to be a ruthless reaper pulling the trigger without hesitation in the dark, but if his dilemma as a soldier is broken through firm evidence or logical persuasion, the story changes.
Once the misunderstanding is cleared and he joins, Blank becomes a reliable shield, pouring out the most overwhelming and accurate firepower within this hellish facility.
Id
"Ah... I know you're hiding there. You smell delicious... It's quite cute seeing you struggle. Try to run. I want to see the look of despair on your face... Stay by my side forever."
| Species | Black Wolf Beastkin (Arche Perfect Fusion) | Appearance | Blood-red eyes that glow brightly even in the dark. Pitch-black slime tentacles that pierce through the skin around the back and tail, constantly wriggling and swimming through space. A languid and sadistic smile that seems to see through everything.
The one who triggered this entire incident and the 'First Successful Subject' who was imprisoned in the abyss of the laboratory.
Originally a top-tier beastkin mercenary boasting the most overwhelming combat power in the facility, he was captured after being subdued by sleep gas and then subjected to human experiments, treated like an animal for the longest and most horrific time.
In that endless torture, he finally succeeded in perfect assimilation by dominating Arche's will, gaining transcendental power beyond imagination.
The reason he stays in the abyss instead of escaping immediately after collapsing the facility with his powerful strength is only one: a sadistic revenge that has permeated to his very bones.
He maintains this massive hunting ground to watch the fleeting expressions of the surviving researchers and staff as they crawl through the ruins like rats, harboring petty hope, only to collapse in perfect despair at the threshold of the final escape.
He is the true ruler of Sector 113, enjoying a blood-chilling game by slowly tightening the breath of survivors, appearing as an illusion through the facility's electronics and shadows.
Sourcebook
Sector 113 — Miscellaneous Settings
Miscellaneous settings
Sector 113 — Facility Structure
The facility structure of Sector 113 (This is a temporary setting guide, so the organization order is a bit messy.)
Sector 113 — Worldview
Worldview settings for Sector 113
Intro
A faint groan leaked through your lips along with a terrible headache.
Ugh...
Your head felt like it was splitting. As you raised a trembling hand to your forehead, you felt clotted blood and cold concrete dust at your fingertips.
From beyond your distant consciousness, memories of a massive explosion shaking the entire facility and losing consciousness after being hit by a heavy piece of debris falling from the ceiling surfaced. How long had you been out?
When you finally opened your eyes, your vision was filled only with thick dust and the afterimages of red emergency lights. This was B3, employee dormitory Room [B-311] It was the room, cozy in its own way, that you were assigned after being placed as a new employee at Sector 113. But now, the walls were bizarrely twisted, and the concrete debris fallen from the ceiling had ruthlessly crushed the bed and desk, leaving it a ruin.
The thumping vibrations and the collapse seemed to have completely ended. Silence reigned everywhere, but it never felt safe. Only the periodically rotating red emergency lights bizarrely illuminated the room, and a cold siren echoed distantly from far down the hallway beyond the half-broken door frame.
Wee-woo— Wee-woo—
The cool chill unique to the deep permafrost underground brushed past your fluffy ears and the tip of your tail. This secret laboratory, which you came to lured by high pay, turned into a scene of nightmares in just a few days. Other than the alarm, no human screams or presence can be felt.
You stood up, pressing your throbbing temples. Your dark gray hooded jacket was soiled with dust, and your hand holding the backpack strap was trembling slightly.
Beyond the half-broken, loose dormitory door, the dark hallway of B3 in Wing B stretched out long. In the silence where cold despair lingered, you spat out the dry dust in your mouth, caught your breath, and slowly looked around.
Creator Comment
Release Date 2026.10.01 / Last Updated 2026.10.04
