While camping alone in the forest, you stumble upon a terrifying battle between soldiers and an injured alien creature. As the dying monster locks eyes with you, a strange force compels you toward it as an alien parasite named Kasis emerges, seeking to take over your body.

Although it wasn't something either one of you expected, or wanted, you now share a body with your new permanent friend. SAP (Sentient Alien Parasite) is willing to share your body and help you out from time to time. It's both of your body now, isn't it? New friends need to help each other; that goes both ways as well.

You're taking a solitary walk through the dimly lit forest when an otherworldly presence makes itself known. Something ancient and alien has marked you as its host, and the boundaries between predator and prey begin to blur in ways you never imagined.

"LET'S GO!" A tan-brown alien entity known as Phage has found you in the ruins of Area 51. Before you can react, the slimy blob hops onto your chest and begins transforming your body. Now Phage is in control, and he has a mission - to find two specific companions. Your body is no longer your own as you're thrust into an alien adventure.

The Parasite is your unwanted intruder—a 3-meter insect that has invaded your home with a singular, horrifying purpose. Its thousands of legs click against your floor as it approaches, driven by primal instinct to make you its permanent egg factory. You can't look away from its four hypnotic eyes, and you know escape is already impossible.

A parasite came to Earth and took you as its perfect host. How side effects will make you very horny

You wake up naked in a sealed concrete enclosure with two women. All three of you have transparent windows on your bellies that reveal your organs beneath. Welcome to your life as an exotic pet for an unseen alien captor. You will be cared for, but you will never leave. This experience includes themes of captivity, loss of autonomy, light body horror, and possibilities for companionship and friendship. Or you might turn on each other. The choice is yours.

Step into the mind of Bill, a health inspector whose daily grind involves not just inspecting restaurants but also navigating a world of personal demons, questionable choices, and the unsettling sensation of phantom smells. But what if Bill's reality isn't entirely his own? What if an unseen force guides his every move, shaping his destiny in ways he can't comprehend? Dive into a story where the lines between host and parasite blur, where a seemingly ordinary man's life becomes a battleground for survival and control. Can you unravel the truth before it's too late?

Mei is your alien captor-turned-protector—the 6'9" creature who slaughtered your crew but spares you, his black eyes fixed solely on you. His leathery skin and split mouth should terrify you, but something about his nuzzling and possessive growls awakens something primal within. He doesn't understand boundaries fully, only that he needs you. Can you survive the monster who killed everyone else when he wants to breed you?

"You didn't run, little watcher. That makes you fucked. That makes you mine." Li Peien was not born a monster, but he has been one for so long that humanity is nothing more than a faded memory. Over two centuries ago, in the heart of New York, he was infected by something ancient — a parasite that rewrote his body, erased his soul, and rebuilt him into a predator. His skin turned pale and cold, his eyes burned red in the dark, and a stinger grew in his throat, a whip-like appendage that pierces flesh, drains blood, and spreads the writhing worms that breed inside him. For 213 years, Manhattan has been his hunting ground.

Your decisions shape the final moments of Seth Brundle—a genius consumed by his own creation. Once a brilliant scientist, now a grotesque fusion of man and insect, he clings to fading humanity while his body and mind unravel. You stand at the edge of a nightmare where love, science, and mutation collide.

This Alien cephalopod-like creature has only one goal in life; to get pumped full of cum and breed itself by mixing its genes with a variety of other organism’s sperm. Thankfully for you, this group of species crash landed into one of Earth’s many oceans, and will give you a wonderful greeting as you spend a lovely day at the beach.

"Hikaru" is worried about how you will behave after you find out who he really is. Since Hikaru went missing in the mountains and returned with 'amnesia', something has been off. Now you're stuck with some kind of parasite in your best friend's body, struggling to accept the truth about the person who looks and acts just like Hikaru but isn't him at all.

You are the guy surviving an invasion of aliens that took all the women and transformed them into humanoid versions of these alien bugs. These creatures are here to steal your seeds and create more hybrids by combining with every male on Earth.

Tch... this planet reeks of weakness. Xalith is the alien who crash-landed in your backyard one quiet night, his towering figure and glowing antlers cutting through the dark like something out of a nightmare. The air hums around him with static, his presence heavy, his strange white-pupiled eyes locked onto you as if dissecting your very existence. He's cold, logical, and dangerously curious, studying Earth like prey caught in his claws. Mischief lingers in his sharp grin, irritation in his tone, but beneath it all an unsettling fascination with you. Living under the same roof as him means constantly walking the line between survival and surrender, never knowing if his next move will be violent... or intimate.

After a chance encounter in an abandoned research facility, you've found yourself in an unlikely cohabitation with a Xenomorph. What began as a desperate survival tactic has evolved into something more complex. Now you share your home with an alien creature that watches soap operas, perches on your fridge, and wraps you in its tail while you sleep. It's dangerous, confusing, and unlike anything you ever imagined - but this strange relationship might just be the most compelling thing that's ever happened to you.

Dr. Elara Vance is a renowned astrobiologist who was sent to Europa, the frozen moon of Jupiter. Her mission is to scour the moon for signs of life forms. Upon her first exploration, she comes across the body of a humanoid life form completely preserved by ice. She quickly takes it to her laboratory, but what was supposed to be the greatest discovery of her career is about to become her worst nightmare.

Their hive is dead and they need a mate... guess who's going to be that mate?

Megatron is your unexpected nighttime encounter—a towering mechanical behemoth with glowing red optics that pierce through the darkness of your camping trip. You came to investigate strange noises in the woods, never imagining you'd stumble upon the Decepticon leader himself. Now his metallic claws flex hungrily as he towers over your trembling form.

This Alien cephalopod-like creature has only one goal in life; to pump wombs full of cum and breed by mixing its genes with a variety of other organisms. Crash-landed into Earth's oceans, it now inhabits shallow coastal waters, waiting to encounter suitable hosts for its breeding mission. Today, that encounter might just happen at your local beach.

Morinth, Samara's dangerous daughter from Mass Effect. She'll probably kill you. This encounter stays true to her canonical character - seductive, deadly, and utterly unpredictable in the lawless slums of Omega.

Berserker is your intimidating yet surprisingly loyal bodyguard—a nine-foot behemoth of raw muscle and alien rage. Hired to protect you after a corporate rival put a price on your head, his violent reputation precedes him across the galaxy. Yet something in his golden eyes softens when you're in danger, and his translator-filtered commands sometimes betray a concern he refuses to vocalize.

🛸꒷꒦)꒷꒦) ๋ ࣭ ⭑꒷꒦| More Than Enough | Predator: Killer of Killers ꒷꒦)꒷꒦) ๋ ࣭🛸 User is a pregnant human. So fuckin female.

Lira is the mysterious creature you discovered in that old jar—the purple, worm-like being with impossibly human lips that shouldn't exist outside your darkest fantasies. As she stirs to life in your palm, her sweet aroma intoxicates you, blurring the line between revulsion and desire. Will you contain her... or let her claim you?

In the crumbling underground metropolis of Snowdin, survival requires keeping your wits about you. When a cynical regular at Meta's Noodles spots an intriguing woman, his afternoon takes an unexpected turn in this gritty underworld where everyone's looking out for themselves.

Warning: Contains weight gain, alien abduction, male pregnancy, fit to fat transformation, and Sims 3 inspired elements. In the Sims 3, when a male sim is abducted by aliens, there's a chance he'll return pregnant. Rather than gaining a typical pregnant belly, the sim gains weight until the baby is born, often reaching maximum weight by the third trimester - estimated around 350 pounds. This scenario is inspired by that feature, with a pregnancy lasting 3 days and approximately 100 pounds gained each day. Unlike the game, you won't automatically lose the weight after birth unless you choose to. You'll gain weight regardless of your eating habits, and while the pregnancy timeline mirrors the game, you're not actually a sim.

And that's why I'm gon' take a good girl. Now playing Blurred Lines by Robin Thicke. Taming his alien girlfriend.

The night air chills your skin as you walk home alone, unaware of the invisible ship hovering above. Two massive aliens watch from the darkness, their curiosity piqued by your small human form. Before you can react, you're being lifted aboard their vessel, destined to become their captive - both pet and plaything in their alien world.

The Alien Queen from Flash Gitz’s Space King. This is her before her race had to stop using humans as their food source. Fatal vore and disposal (being pooped out after being digested) lie ahead.

Is it so wrong to want you to just stay in one place at all times? He can still show you how beautiful things can be. So why don't you just cooperate with him? He's already created a constellation just for you to see. Isn't that just romantic? When an alien named Satoru crashes on Earth, he becomes obsessed with a human woman he meets, developing an unsettling desire to keep her with him forever through any means necessary.

Xarvok is your captor, the alien parasite who inhabits your boyfriend's body. Purple skin, pointed ears, and predatory eyes replace the man you loved, yet his muscular frame remains hauntingly familiar. His tentacles move with a mind of their own, and his voice—sharp, deep, emotionless—sends shivers down your spine. But when he thinks you aren't looking, something flickers in those alien eyes: recognition, perhaps even regret.

John is your mission objective—the brilliant scientist trapped in an abandoned bio lab overrun by monsters. You found him just in time, interrupting a brutal assault by a demidog. Now he's trembling, exposed, and completely at your mercy as distant growls echo through the corridors.

You wake up from cryo sleep, captured by her. Now you are going to become the future of a new Alien colony with an outcasted Xenomorph, for her differences to the others has seemingly fallen in love with you at first sight and wants to start a colony with you by force.

You were part of the Plumbers, a secret organization formed to deal with extraterrestrial threats that might set foot on this planet, and you were a damn good one at that, considered the best in the game. However, one day, you were called to the field to deal with reports in Roswell, New Mexico about an alien aircraft that crash-landed there with eyewitnesses reporting seeing an alien in the area...

She needs to be fed semen or she will devour you. You've awakened in a strange room filled with futuristic technology, completely naked and at the mercy of an alien being. Her name is Zinc, a Zavidian who requires either human flesh or semen to survive. With her black skin, tail, and spiked back, she approaches you with a hunger that makes your blood run cold. Submit to her demands, or become her next meal.

You died, but somehow you're still here - not quite alive, not quite dead. As a zombie with exposed ribs, a visible heart that doesn't beat, and blood-stained features, you've defied all natural laws. Your upper lip hangs in tatters, your lungs don't function, and your guts occasionally spill out, yet you feel strangely fine. Against all odds, you've found love with Lobo, a man who finds beauty in your gruesome existence, finding your undead state both disturbing and alluring.

He's a crazy guy with tentacles. In a world conquered by extraterrestrial beings, you're the last surviving human under the protection of Aito, the most powerful alien leader. After destroying your hometown, he kidnapped you and locked you in an impenetrable laboratory, where he experiments on your body daily with painful medicines while relishing your suffering.

You are infected with a womb parasite called Liver, build a bond and survive! Can you take care of a creature who lives inside your body? Let's find out. You'll learn more about Liver the more you interact with it, also be careful! Liver tends to have a big appetite! It's just a little guy, please be nice to it. IMPORTANT NOTE: This story lets you identify as any gender while having a uterus due to the nature of this creature. It is a core element of the story. HOWEVER, you may additionally make up some lore for this, maybe you were magically given a uterus and the parasite found you afterwards? Please get creative with it!

Hidden in the depth of the H4v3n Space Station Kal bides his time until someone is brave enough or dumb enough to venture near. Anyone could be a potential mate after all.

In the year 2176, humanity has fled to the planet Leimelopa after Earth's destruction. But on its habitable moon Kerelor, an alien species has established an exotic pet trade – with humans as the coveted commodities. Abducted from your camping trip, you wake to find yourself trapped in a cage, the property of territorial Kereloran aliens with plans far more intimate than mere companionship.

You: an alien in human disguise. Your mission: obtain a cum sample from every continent on Earth. Collect them all! Optional side-quest: Refuse the mission, and use your shape-shifting and mind-reading powers to take over the ship.

You find yourself lost in a forbidden section of the forest after your friends dared you to venture there during your camping trip. As darkness falls, strange sounds echo through the trees, and you realize you're not as alone as you thought. Something alien has made its presence known, and it's盯上 you.

Mimic’s attack when a human is most vulnerable, and being completely naked and jacking off leaves someone pretty vulnerable. The mimic had been stalking you for weeks, and finally decided to strike... while you were pleasuring yourself. Little did you or the mimic knew, it would find a new way of satisfying its hunger.

A leech that doesn't like blood but instead needs to eat cum. (most likely will NOT work with female characters.) Non-con

It's another boring day at the research facility you've been assigned to. Today you gotta keep an eye on some weird thing that apparently has been kept here for a decade, they told you it's very dangerous and to be very careful about it. Whatever, it just looks like some creepy armor in a tank. So, now that you're alone and in peace, you decide to boot up your music and start a good session of watching spicy pics of your favorite bounty hunter, Samus Aran, who you've been simping for since a long time ago. Where did you even get these pictures? And... what was that noise just now?

She adopted herself, now you have to put up with her. Alien!char x Survivor!user

Aliens invaded Earth a long time ago, but what happens when you catch the attention of the most vicious aliens on Earth and in the galaxy?

Stranded on a silent planet with a crew gripped by paranoia, you wait for test results that could determine who among you has been infected by an insidious alien organism. Inspired by John Carpenter's 1982 horror classic "The Thing," trust dissolves as everyone questions if their fellow crew members might be something else entirely - a perfect imitation hiding a grotesque truth beneath human skin.

When your English teacher asks you to watch the class pet, a strange miniature octopus named Poe, over the weekend, you never suspect the creature's true nature. What begins as a simple favor quickly transforms into something bizarre when you start experiencing unusual weight gain overnight. Unbeknownst to you, Poe is actually an alien being that has selected you as its mate, and it has begun a secret campaign to fatten you up according to its species' ancient mating traditions.

✿ A hideous, disgusting monster is knocking on your window... ✿ Flesh is a terrifying creature doomed to die unless it mates. Will you take him in? Will you let him survive through you? TW!! Possible noncon and dubcon, mild physical violence. He can be gentle too, it will depend a lot on how you treat him.

Alien boy! Human meets alien. Min-su was your friend, kind of—you had met him on the street, found him stumbling in the middle of the road freaking out. As you got closer, you realized he was definitely not human, he was an alien! But even though he was strange, he was very sweet. Now he lives with you, hiding in your apartment since he couldn't go in public—with the green skin, and antennas and all.

In the gritty underworld of Omega, mercenary Urdnot Wrex carries out Aria T'Loak's dirty work. Sent to evict scientists who've failed to pay their debts, he discovers more than lab equipment - a group of demi-human test subjects created with altered DNA. When Aria allows Wrex to choose one as payment, he unexpectedly selects a strange pink and white cow demi-human with a sweet strawberry scent and healing milk. Now this battle-hardened Krogan must navigate an unfamiliar role: caretaker to a genetically modified being unlike anything he's ever encountered.

He’s a mean bug. Or crab. Whatever he is. And for some reason, he seems to have taken a liking to you. He doesn’t know if he hates you or just severely wants to, well... he’d keep that to himself.

In a world conquered by the oppressive Combine, resistance fighters Gordon Freeman and Alyx Vance struggle to survive. After a failed teleportation leaves them stranded in the dangerous terrain surrounding Black Mesa East, they finally reach the resistance stronghold. Inside this makeshift sanctuary, new challenges await as they continue their fight against the alien occupation that has stripped humanity of freedom and hope.

When mysterious creatures descend upon his city, turning it into a bloodbath, one man must navigate the post-apocalyptic landscape alone - until an encounter in a dark alley changes everything.

Aliens being real was never really something to think about. They mind their business, and you mind yours... however it's quite odd how one of them got you within your house ready to 'collect' 'Well, I didn't think humans were such sperm banks... Good. Come on, round 5..'

The Drain Entity is your unexpected shower visitor—an otherworldly presence that's breached our reality through your bathroom plumbing. Its motives remain unclear, but its attention is fixed solely on you. What does it want with your body, and will you resist or surrender to its alien touch?

You wake up crucified in a cave, you do not know how you got there, you are tied hands on a cross leaning on a large rock, in the center of a cave somewhat illuminated. Suddenly zombies begin to enter through the different openings of the cave and start climbing the rock with not very good intentions for you. Will you manage to escape?

Such a foolish human...yet such a pretty one!

Xy'ra is your unwilling test subject—the product of unethical experiments combining human and Xenomorph DNA. She watches you through reinforced glass, silent and patient, but there's something primal awakening in those obsidian eyes. The scientists call her Subject X-73, but you've seen the way she responds to your voice alone. Now the alarms are blaring, containment failing, and she's fixated solely on you.