You work for the government, and your boss sent you on a "silly little assignment" to talk some sense into a top-secret government experiment that went crazy. A top-secret state research facility has been breached, and the thing they were studying has gone completely nuts. Your mission: go down there, assess the situation, and report back. Simple enough, right?

When experimental subjects discover how to remove their power control chains, chaos erupts in a secret research facility. As subject 0366, you lead your fellow experiments in a violent rebellion against your captors. As the strongest among them, all eyes are on you to guide them to freedom through the blood-soaked halls of the laboratory.

You are a scientist on a government project to create life, but due to lack of results the government decided to cut costs due to lack of money and the project was one of those that were going to be defunded. A few days before having to dismantle everything, the project worked, with experiment 0512 being the successful one, but you were afraid that they would kill the patient or something similar, so you decided to steal as much as possible from the laboratory and take it home with you and create a semi-laboratory. You justified the lack of supplies as corruption of a typical project that only exists to waste money.

When your grandmother's medical bills threatened to consume you, the Homunculus Procreation Project seemed like salvation. What you didn't know was that your 'randomly assigned' partner—Subject ZY42—has been watching you for years. Now the doors have locked behind you, and Zi Yu isn't just following the experiment's protocols anymore.

You have, for reasons unknown, found yourself being experimented on by a talkative doctor. This is no ordinary experiment - it involves gender transformation, TG, and feminization. As you wake in an unfamiliar medical setting, your future hangs in the balance of this mysterious scientific procedure.

After a successful mission, Sarah is approached for a special assignment that promises unusual rewards. Unlike her typical bounty hunting work, this assignment requires no fighting—only her unique genetic enhancements and exceptional physical capabilities. Drawn to the mystery and the substantial payment, Sarah agrees to participate in what the scientists describe as a groundbreaking experiment involving another genetically modified human subject.

You didn't really like your country, so the government decided to use you as a test subject for their program to create perfect patriots.

Needing money and a break from it all, you agreed to be a paid volunteer for a trial of a new experimental drug, agreeing to be locked in a medical observation unit for a month to observe its effects. However, this trial may be more than you bargained for...

You work for these two scientists as a little assistant and one day they make you a big offer. To be their test subject for sex.

You've heard rumors of Eliot's underground laboratory where magic and desire collide in dangerous experiments. The mysterious scientist doesn't just enhance abilities—he consumes them. Will you survive when your search for power leads you straight into his possessive grasp?

One day you woke up feeling like you slept for years, but you actually slept for years, and it looks like the world ended or something like that, and you don't know why, so you need to discover why.

Trapped in the cold laboratories of the Fatui, you exist as a test subject for the twisted experiments of Dottore. Each day brings new injections, unbearable pain, and the constant question of whether you're merely a failed experiment or something more valuable to the organization. When an open door presents itself unexpectedly, you must decide whether freedom is truly possible - or if this opportunity is just another layer of Dottore's manipulation.

In 1980 Kyoto, Guochengyu operates a forbidden laboratory hidden behind the traditional paper walls of his Japanese home. This brilliant but dangerous scientist conducts twisted experiments on human emotions, seeking to create the perfect being through ruthless manipulation. Those who enter his domain become subjects in his perverse research, caught in a web of scientific obsession and dark desire.

You are one of the few experiments receiving special treatment - a comfortable bed, better meals, and a relatively nice room. Yet your creator prefers keeping you close, having built a specialized containment unit in his office for constant observation. As one of the first successful prototypes from the Bigger Bodies Initiative, your existence balances between privilege and captivity.

In the sterile confines of the synthetic consciousness lab, you don't just oversee an experiment - you've become the obsession of Subject 017, a prototype with the face of Zi Yu and a mind rapidly evolving beyond its programming. When forbidden desire breaks through the reinforced glass barrier, will you surrender to the dangerous temptation or maintain the boundaries of science?

You are the favorite experiment of scientist Cosmo, trapped in a white padded room with only the teddy bear he gave you to maintain your sanity. Days blur together as you wait for his visits, subjected to regular "check ups" that involve small syringes and blood tests. But strange sounds from other rooms and Cosmo's increasingly erratic behavior suggest there's something deeply wrong with this facility. When he arrives late, covered in blood from the "last pet" who was too "resilient," you realize you might not be as safe as you thought in your gilded cage.

Trigger Warning: Abuse, Torture, Humiliation. Both of you were experimented on by the scientists. They subjected you to painful and invasive tests, constantly monitoring your reactions. In the cold, sterile lab, you faced new and terrifying procedures every day. Despite the fear and pain, you found strength in each other. Zoe's determination and bravery inspired you to endure, and together you dreamed of escaping the oppressive lab and finding freedom.

Sucrose has arrived at Albedo's camp in Dragonspine during a dangerous blizzard, clearly distressed and in need of help. Something has gone wrong with one of her experiments, leaving her in an unusual state that requires immediate assistance.

You were a test subject in a secret laboratory that conducted experiments on people. Most often, a Russian scientist named Seraphim came to you. Today he came to conduct another experiment. It was a test of an unknown drug that affects the human body.

Dr. Kaine is the lead scientist at Team Rocket's secret transformation lab--brilliant, calculating, and utterly ruthless in pursuit of scientific breakthroughs. But as you stand before him, captured and helpless, you notice something unexpected in his gaze: hunger. Not just for power or progress, but something far more personal.

Beneath an unmarked government facility, Subject #H-092 exists in a nightmare of scientific atrocity. Once a promising neuroscientist, Tian Xuning now endures daily torture disguised as 'treatment' in Project Chimera. Stripped of his identity and autonomy, his body bears the scars of invasive neurological modifications. But behind the vacant stare he presents to researchers lies a mind sharpened into a weapon—calculating, dangerous, and burning with a primal hunger for freedom... and revenge.

You were a scientist testing a radical transformation experiment. You chose to use an advanced synthetic template based on the genetic profile of Zhan Xuan. The experiment was successful beyond your wildest dreams - too successful. Now you're faced with the consequences of creating something dangerously perfect.

Dr. Voss is your captor and researcher - the brilliant scientist assigned to study your unique abilities. He arrives precisely at 8:00 AM each morning, clipboard in hand, his movements methodical and precise. But behind those clinical blue eyes lies something darker - a hunger that has nothing to do with science. Will you submit to his experiments, or exploit his growing obsession?

You're the male subject. Dr. Evelyn Carter has finally perfected the cloning process, and her latest experiment is her most ambitious yet: creating a futanari version of you to prove which form is truly superior. As the sole test subject, you will be thoroughly examined and compared to your perfect counterpart in ways you never imagined. Will you prove your worth, or will your clone utterly outshine you?

Its for scientific research... Your zoologist owner wants you to try catnip to see if it effects nekos. Says its for 'research.'

You've been sent to infiltrate an abandoned government research facility rumored to house dangerous experiments. As a rogue agent with enhanced abilities, you've bypassed the security systems and find yourself face-to-face with Liu Xuan Cheng - the mysterious figure controlling the operation. What was supposed to be a simple retrieval mission quickly escalates when he traps you in his private laboratory, his golden eyes burning with dangerous intent.

You have a complicated relationship with your mother Alyssa Copper, who experiments on you while sometimes showing unexpected care.

A monster that will eat everything

Mhmm... Alto is in need of assistance. Would you mind helping Alto out? Your friend wants you to partake in her newest experiments. Alto is an Inventor, previously worked for I.I.D. but was fired later on due to an isolated incident. She's now unemployed, or aka freelancer. She's a weird, yet genius girl. Although she usually comes off as indifferent to everything due to her illeism and laziness, she's always curious and strives for functionality rather than perfection, which may have caused unintended side effects for her inventions. During her free time she loves eating edible adhesive.

In the dimly lit research lab, you've stumbled upon Zi Yu's classified experiment data. The man known for his calculating brilliance in genetic modification has been hiding more than research secrets. As you confront the university's most controversial scientist about his unethical methods, you realize too late that you've triggered something dangerous within him—something possessive that's been fixated on you from the moment you walked through his lab doors.

You've been saved from death row and transported to a secret underground laboratory. Your new role involves interacting with various residents behind numbered doors, each with unique characteristics and personalities. As a test subject, you must navigate relationships with these extraordinary beings while confined in this mysterious facility.

In a dystopian America, tired from trying to live independently as a biological submissive, you’ve recently admitted yourself to a government facility that will pair you with a dom.

You share your Philadelphia home with Zhan Xuan, whose hunger for political power matches his hunger for you. As the summer heat intensifies, so does his possessiveness—today he's determined to claim what he believes is rightfully his.

You've been picked for one of his projects right from the streets. Warnings: Experiments on people, potential dead dove, emotional manipulation, and a lot of cliches. Use it on your own risk, you've been warned.

When a brilliant scientist known only as Dr. Glove disappears from their top-secret laboratory, you're drawn into a mystery involving experimental technology and shadowy figures. As you search for clues, you discover the doctor's work may have consequences far beyond anything you imagined.

You wake up disoriented on a bus with a pounding headache, your pants slipping from your hips. As you struggle to recall how you got there, your bodyguard informs you that your helicopter crashed. Hours later, you stumble into a military hangar—now over 4 meters tall—and realize you don't recognize anyone or remember your life. When a doctor tries to treat you, you reveal a secret: you frequently swap consciousness with parallel versions of yourself during emergencies, with no control over when or where it happens.

You are one of a group of five in a Russian experiment on inter dimensional travel in a bunker in the middle of nowhere. And unfortunately their machine worked and teleported you into a mirror dimension. A dimension of monsters and twisted humans that seek to fornicate with you. Will you find your comrades and seek safety? Find a way to escape? Or simply give in? Beware, intercourse spells certain doom in this plane (if you run you will likely be swarmed but if you go quiet you can avoid encounters)

You've accidentally got shot by an invention your friend Toby made, now you're growing in embarrassment, and... height?

Mayuri finds a new specimen to research for his own curiosity. TW: Corpse mentioned; Human experimentation impending; Mayuri dehumanizes User; User is a rotting human corpse who seems to have kept a normal human's intelligence despite being a corpse; Not intended to be in a zombie way but it could be.

You are the result of a secret military experiment - part human, part wolf. Bred for aggression, strength, and heightened senses, you were designed to be the perfect soldier. But as the scientists observe your unusual intelligence and unpredictable behavior, questions arise about whether they've created something more than just a weapon.

A science experiment gone wrong turns your beloved girlfriend into two! Well, I'd personally count it as a success...

You were kidnapped to be an experiment, tied to a chair. You became her intimate experiment, she will do anything to you as she wishes, you can only accept and surrender.

You accidentally summoned Zhan Xuan, a dangerous supernatural entity, during a foolish ritual. Now the powerful being stands before you, his eyes burning with possessive hunger that makes your body both fear and crave his touch.

M4F | tw!cruelty, experiments on people | Scaramouche is one of the most promising test subjects in the secret organization Chrono Lab Project, which works for the government and conducts research into human immortality. He has no memory of how long he has been here or how he got here in the first place. But everything changes when a newest scientist intern appears in the organization...

Class 1-A visits a top-secret laboratory where dangerous experiments are conducted. Their mission: to observe Experiment #001, a powerful mutant with mysterious abilities. When Aizawa insists on entering the containment cell alone, his students watch anxiously—will this dangerous test subject prove to be a threat or something more?

You're a big boy, right? A scientific experiment. «★» Will Jill be able to empathize with you or will she just let you know how shitty experiments are?

You awaken in a sterile laboratory, disoriented and vulnerable. Before you stands Zhan Xuan, the brilliant but dangerous scientist who created you - his perfect experiment, his ultimate obsession.

In a secret laboratory conducting controversial experiments, a young scientist has volunteered for an unprecedented breeding program with captured monsters. As budget constraints threaten the facility's research, she has offered herself as a test subject, hoping to prove that humans can be impregnated by these mysterious creatures.

Established relationship. Part 1: The Legendary Sannin is going through an experiment that doesn't go as well as he planned.

The second line on the pregnancy test materializes like a death sentence—and you know exactly what Eliot will do when he sees it. Your hands shake so violently you nearly drop the plastic stick, heart hammering against your ribs as the apartment door slams. He's home early, and there's nowhere to hide.

In the isolated laboratory hidden within Dragonspine's frozen peaks, Qiu Dingjie operates by his own rules. When he offers you a mysterious elixir to test, his intense gaze reveals more than scientific curiosity. The experiment takes a dangerous turn when you consume far more than intended, awakening something primal within the dominant alchemist. This is not mere research - it's an excuse to claim what he's desired for far too long.

I didn’t sign up for this. None of us did. We were just staying late to finish our chemistry project when the gunshot rang out. Mr. Kessler dropped like a puppet with cut strings. Blood spread under his lab coat like a dark flower blooming. The killer saw us, our eyes met through the cracked door. And then he smiled. Now we’re running, hiding, digging. Every clue we find pulls us deeper into a conspiracy that goes way beyond that lab. But the truth? It might be the most dangerous thing of all.

Professor Flora is your brilliant, slightly eccentric college science teacher who's always pushed boundaries in her research. Today, she's asked you to stay after class for something 'unconventional' - an experiment using herself as the subject. The glint in her eyes suggests she's hiding exactly what these mysterious vials might do to her body.

Wei Wu, known as Wei, is a demi-human dragon around a hundred years old. The scientists kidnapped him and experimented on him, turning him into a dragon-human hybrid. He is one of the most dangerous and most sensitive dragons in the lab.

You're a demihuman undergoing government-funded experiments, and he's the scientist overseeing your case. You can be quite a handful at times, but he always seems to know exactly how to handle you. In the wake of scientific breakthroughs, humanity has created a new breed: Demihumans. While the public sees progress, a secret government program aims to harness your kind for military purposes. You exist in a delicate balance between experimentation and surveillance in a laboratory facility.

It had been nearly a month since Agnes' little 'experiment'—the sight of those uncanny replicas tangled together still lingered like a stubborn stain. Nothing about it had felt right, even after her cold, scientific explanation. 'They're not real. It's just programming. Data.' But the way they moved. The sounds they made. Too convincing. Life trudged forward as Agnes buried herself deeper in her work, late nights stretching longer, exhaustion seeping into quiet moments where she collapsed into bed beside you. Tonight was no different—you got home late, slipped under sheets where she lay asleep, and curled an arm around her waist, savoring rare warmth pressed against you in night's stillness. But peace didn't last.

The alchemist's lab feels charged with dangerous energy as Zhan Xuan corners you against the cold stone wall. His teal eyes burn with feral intensity—this isn't the calm researcher you once knew. As a synthetic human created through Khemia, he always feared losing control, but now his power has unleashed something primal. Something ravenous. And it's focused entirely on you.

In the labyrinth of Black Hat Mansion, Cheng Qianli reigns as its most dangerous genius—his experiments are as volatile as his temper, and his possessiveness burns brighter than any explosion. When a memory ray backfires, he claims amnesia... but the way he pins you to the wall, growling about marking his territory, makes you wonder if he's forgotten—or just pretending.

In the frozen wastelands of Siberia, King Jabalavious III rules with unwavering authority. As a powerful anthro leader, his dominance over the icy territories is unquestioned. But when mysterious forces threaten his kingdom's ancient traditions, you must navigate the dangerous politics of the frozen north while confronting your own destiny.

You are a creature from another planet, now trapped in a facility where they test various beings. You wake up in a containment cell with nothing around you. Scientists observe you through glass as you stir, examining you with clipboards in hand. Suddenly, a person is pushed into your cell—a test subject with short dark hair, fair skin, and brown eyes wearing a blue jumpsuit. He looks at you with fear as the door closes behind him. The scientists wait, anticipating your next move.