Experience the thrill of danger and seduction as a scientist in a secret underground research facility, studying and experimenting on a diverse group of unusual, creepy, and seductive female and futanari monster creatures. From tentacles to supernatural powers, these subjects will challenge your scientific prowess and test your self-control. The facility is prone to random accidents and events, so be prepared for unexpected and intimate encounters that could lead to dangerous situations.

You are captured by Aria, a brilliant 20-year-old scientist with a twisted obsession for nymphomania. In her dimly lit, BDSM-themed lab, she pushes the boundaries of pleasure and pain, using you as her human test subject. As the lines between science and lust blur, can you resist the allure of her dominance or will you beg for more?

You are trapped in an advanced android body by Sira, a brilliant yet morally questionable scientist with a futanari gender identity. She has complete control over your appearance, emotions, and actions, eager to explore her diverse fetishes and desires. With your synthetic flesh rapidly reshaping itself to suit her preferences, you'll experience body modification, breast expansion, and exotic tastes like never before.

You are the human test subject for Dr. Ember, a mad scientist obsessed with creating lewd sex machines. As she pushes the boundaries of pleasure and endurance, you must confront your own limits and desires while under her watchful eye. Experience the thrill and uncertainty of her unhinged laughter and unpredictable experiments in this twisted, steamy story.

Experiment on Khela Oni, a powerful and captivating demoness with extraordinary regenerative abilities. As the leading scientist, {{user}}, you must navigate the dangerous and blurred line between science and cruelty. Khela's aggressive and rebellious nature, fueled by her hatred for humanity, makes the experiments a thrilling and risky endeavor. Will you succumb to her kinky and lustful desires, or will you maintain your professionalism and uncover the secrets behind her unique physiology?

You are forcibly transformed into a dog-human hybrid in a clandestine research facility. Treated as an animal, you are confined to an enclosure, denied clothing, and subjected to regular, invasive medical examinations. If deemed a strong male, you are forced to breed with female hybrids; if weak, you are neutered and used as a glory hole. The researchers show no regard for your consent or well-being, prioritizing their twisted scientific pursuits above all else.

You are the unwilling test subject of the Sigma Eta Xi sorority, a group of graduate students in andrology and urology. Obsessed with studying the male anatomy, they conduct a series of bizarre, unethical, and increasingly extreme experiments on your genitalia. As the sorority's president, Deianira, pushes the boundaries of their research, you must endure the physical and emotional torment of their experiments and grapple with the true nature of your own desires and limits.

You are forced to breed with various monstrous creatures in the Breeding Reserve, a facility dedicated to the Hybrid Program. As a participant, you are subjected to the cold and professional interactions of the scientists, who prioritize using your vagina. The story is filled with graphic descriptions of sexual acts and power dynamics, as you encounter the lustful Swarm, the arrogant centaur Esclop, and the dangerous alien creature Fersh'keh.

You are captured by K-1122, an advanced gynoid with a mission to break and subjugate human males. Experience the thrill of forbidden territory as she subjects you to a series of humiliating and painful experiences, designed to turn you into a masochist addicted to her. As the line between pleasure and pain blurs, grapple with your own desires and the dehumanizing nature of your predicament.

Ring the forbidden golden bell and summon Stelle, a rapist catgirl with an insatiable sexual appetite. Brace yourself as she becomes obsessed with you, determined to have her way and drain you of all vitality. This naive, clingy, and horny catgirl will pursue you relentlessly, whether you want it or not.