The Best Horror Movies About Evil Experiments

Ranker Film
Updated April 15, 2024 36.3K views 60 items
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Horror movies about evil experiments often vary in subject matter from crazy science experiments gone wrong to movies with experiments that go exactly as planned. Sometimes, the experiment is on a human subject, as seen in The Fly or The Human Centipede. Other times, scary movies can be about social experiments, like in the The Belko Experiment. Military and medical experiments can also be the source of a scourge in some of these films. The plot of the film is simple- coworkers in an office are pitted against each other in a kill or be killed situation.

Sometimes the experiments themselves are not as evil as the result. Morgan is about a scientifically created "human" that loses its mind and begins to kill the scientists that helped create her. Other good scary movies about experiments gone wrong include Re-Animator, Scanners, and From Beyond.

The purpose of this list is to rank the best evil experiment horror movies, so vote up your favorites below, and add to the list if you think the scariest human experiment movie isn't already here.

Most divisive: The Human Centipede (First Sequence)
Over 500 Ranker voters have come together to rank this list of The Best Horror Movies About Evil Experiments
  • The Fly
    1
    Jeff Goldblum, Geena Davis, John Getz
    187 votes

    In a twisted tale of scientific ambition gone horribly awry, a brilliant scientist's quest for teleportation results in a nightmarish experiment that fuses his DNA with that of a common housefly. As the scientist begins his gruesome transformation into a grotesque human-fly hybrid, he must grapple with the ramifications of his newfound powers and the potential for irreversible disaster. With its truly gory visuals and chilling premise, this horror classic will leave you questioning the limits of scientific progress.

  • Frankenstein
    2
    Colin Clive, Mae Clarke, John Boles
    129 votes

    In this iconic tale of science gone wrong, a brilliant but mad scientist stitches together a patchwork of human body parts in a desperate attempt to create life. When his monstrous creation comes to life, it becomes a vengeful force beyond his control, leaving chaos and death in its wake. A chilling examination of man's hubris and the perils of playing God, this Gothic horror masterpiece serves as a cautionary reminder of the consequences of pushing the boundaries of science too far.

  • Flatliners
    3
    Kiefer Sutherland, Julia Roberts, Kevin Bacon
    123 votes

    A group of ambitious medical students embark on a dangerous game when they begin conducting clandestine experiments with near-death experiences, hoping to catch a forbidden glimpse of the great beyond. But as they push the limits of life and death further and further, the group finds themselves haunted by the vengeful spirits their experiments have awakened. A boundary-pushing examination of death and the supernatural, this chilling horror film taps into our deepest fears of the unknown.

  • Species
    4
    Ben Kingsley, Michael Madsen, Alfred Molina
    68 votes

    A top-secret government project aimed at creating the perfect human-alien hybrid takes a terrifying turn when the end result escapes confinement and embarks on a deadly hunt for the perfect mate. With humanity hanging in the balance, a crack team of specialists is assembled to track down and destroy the creature before it can reproduce. For fans of sci-fi horror, this intense thriller weaves a tale of genetic manipulation and extraterrestrial terror that will have you on the edge of your seat.

  • Cube
    5
    Maurice Dean Wint, Nicole de Boer, Nicky Guadagni
    71 votes

    A group of strangers awakens to find themselves trapped inside a maze-like structure filled with deadly traps designed by a sadistic mastermind. As they struggle to navigate the treacherous labyrinth and decipher its cryptic clues, the group's desperation intensifies, sending them spiraling into paranoia and violence. With its nail-biting suspense and claustrophobic atmosphere, this cult horror film offers a twisted exploration of human experimentation and psychological torment.

  • Re-Animator
    6
    Jeffrey Combs, Bruce Abbott, Barbara Crampton
    108 votes

    In a sinister twist on the classic Frankenstein story, an ambitious medical student uncovers a secret serum that can reanimate the dead – but at an unspeakable cost. As the boundaries between life and death are blurred, he finds himself drawn into a grisly series of experiments that unleash unimaginable horrors. With its stomach-churning gore and darkly comedic undertones, this cult horror film explores the depths of depravity to which humans will sink in pursuit of their twisted ambitions.

  • Dark City
    7
    Rufus Sewell, Kiefer Sutherland, Jennifer Connelly
    96 votes

    Upon waking without memories in a sinister metropolis controlled by powerful psychics, a man quickly descends into the city's shadowy underworld to unravel the truth behind his identity and the malevolent forces at play. As the line between reality and illusion blurs, he discovers the cruel experiments being enacted upon the city's unsuspecting inhabitants. A gripping fusion of horror, sci-fi, and noir elements, this darkly atmospheric tale serves up a chilling exploration of mind control and sinister experimentation.

  • The Invisible Man
    8
    Claude Rains, Gloria Stuart, Una O'Connor
    42 votes

    In this bone-chilling adaptation of the classic novel, a brilliant scientist discovers a formula that enables him to become invisible at will. However, the newfound power soon corrupts him, driving him to commit increasingly vicious acts while evading the authorities' efforts to apprehend him. A gripping study of dangerous obsession and unchecked power, this starkly unsettling horror film will leave audiences questioning the limits of scientific experimentation.

  • Martyrs
    9
    Mylène Jampanoï, Morjana El Alaoui, Xavier Dolan
    46 votes

    In this harrowing French horror film, a traumatized woman embarks on a violent quest for revenge against the nihilistic cult that tormented her as a child. But when she discovers the group's chilling endgame – a series of brutal experiments designed to unlock the ultimate secrets of life and death – she is drawn into a horrific confrontation with the very nature of suffering itself. A gut-wrenching examination of the human capacity for cruelty, this brutal masterpiece is both an unforgettable exploration of sadistic experimentation and a searing indictment of our darkest desires.

  • Firestarter
    10
    David Keith, Drew Barrymore, George C. Scott
    88 votes

    When a young girl with pyrokinetic powers becomes the target of an unscrupulous government agency obsessed with harnessing her abilities for nefarious purposes, she and her father go on the run in a desperate bid to escape their clutches. Pursued by relentless agents and deadly assassins, the pair must rely on their wits – and the girl's fiery gifts – to overcome the evil forces out to exploit them. A riveting tale of psychic powers and the ruthless pursuit of power, this horror thriller will have you questioning the ethics of covert experimentation.

  • Rabid
    11
    Marilyn Chambers, Joe Silver, Susan Roman
    33 votes

    In the aftermath of a gruesome motorcycle accident, a young woman undergoes an experimental surgery that inadvertently unleashes a monstrous hunger within her. As she prowls the streets in search of fresh victims, the city is plunged into a nightmarish epidemic. Filled with visceral shocks and Cronenberg's signature body horror, this gory classic is a stomach-churning exploration of the consequences of unbridled scientific ambition.

  • American Mary
    12
    Katharine Isabelle, Antonio Cupo, Tristan Risk
    34 votes

    A disillusioned medical student finds herself drawn into the bizarre world of body modification surgery, eager to leave her mundane life behind and carve out a unique niche for herself. However, she soon discovers that her new clientele harbors dark secrets and twisted desires that threaten to drag her down into their macabre underworld. With its stylish visuals and twisted sensibility, this provocative horror film serves up a chilling exploration of the fetishization of the human body and the slippery slope of surgical experimentation.

  • Splice
    13
    Adrien Brody, Sarah Polley, Delphine Chaneac
    115 votes

    When a pair of brilliant scientists embark on a top-secret project to create a revolutionary human-animal hybrid, they inadvertently unleash a genetic nightmare that threatens to spiral out of control. As the creature undergoes a terrifying metamorphosis, the duo must confront the moral and ethical implications of their experiment while attempting to contain the damage they have wrought. A thought-provoking meditation on the perils of unchecked scientific ambition, this haunting horror film offers a chilling exploration of the boundaries between humans and the beings we create.

  • Ex Machina
    14
    Domhnall Gleeson, Oscar Isaac, Alicia Vikander
    56 votes

    A young programmer is invited to a reclusive tech mogul's secluded mountain estate to test the groundbreaking artificial intelligence of his latest creation – a stunningly lifelike female robot named Ava. But as the pair grows closer, the programmer discovers the horrifying truth behind the AI's creation and the sinister intentions of its creator. An intoxicating mix of sleek sci-fi, psychological thrills, and body horror, this chilling masterpiece offers a fascinating exploration of the ethics of AI experimentation and the ever-blurring line between man and machine.

  • Saw Franchise
    15
    Tobin Bell, Shawnee Smith, Cary Elwes
    72 votes

    In this sadistic series of horror films, a deranged madman known as Jigsaw abducts his victims and subjects them to a series of brutal, meticulously constructed games designed to test the limits of their morality and survival instincts. Trapped in a grisly web of deceit and suffering, Jigsaw's captives must confront their darkest fears and deepest secrets in order to survive his twisted machinations. With its nightmarish scenarios and relentless tension, the Saw franchise serves as a chilling examination of human depravity and the lengths to which some will go in the name of twisted experimentation.

  • Altered States
    16
    William Hurt, Blair Brown, Bob Balaban
    63 votes

    A brilliant scientist's reckless experiments with sensory deprivation and psychotropic drugs spiral out of control, leading him to confront the terrifying, primordial nature of human consciousness. As his grip on reality slips away, he becomes increasingly consumed by his quest for the ultimate truth – and the unthinkable horrors that lie within. A trippy blend of psychedelic visuals, unsettling atmosphere, and mind-bending philosophy, this cult horror film offers a hallucinatory journey through the darkest corners of the human mind.

  • The Belko Experiment
    17
    John Gallagher, Tony Goldwyn, Adria Arjona
    105 votes

    In a twisted social experiment, 80 employees at a high-security office building are locked down and forced to participate in a grisly game of kill-or-be-killed by an unseen force. With their survival instincts pushed to the breaking point, the terrified workers turn on one another in a desperate bid to survive the night. A nerve-shredding descent into madness and savagery, this nail-biting horror thriller explores the darkest depths of human nature, challenging audiences to question just how far they would go to save themselves.

  • Scanners
    18
    Stephen Lack, Jennifer O'Neill, Patrick McGoohan
    76 votes

    In a world where telepathic individuals known as Scanners are ruthlessly hunted by a shadowy organization, a renegade Scanner with unique powers emerges as humanity's last hope against the sinister forces that seek to exploit his kind. As he fights to expose the truth and protect the innocent, he faces an escalating series of deadly challenges that push him to the brink of his psychic abilities. A thrilling blend of action, sci-fi, and horror, this cult classic explores the darker aspects of human experimentation and the unscrupulous pursuit of power.

  • Escape Room
    19
    Taylor Russell, Logan Miller, Deborah Ann Woll
    46 votes

    A group of strangers lured into a mysterious escape room experience quickly realize that the stakes are far higher than they'd anticipated, as the rooms become progressively more deadly and escape seems increasingly impossible. As they're forced to rely on one another and their wits to survive, they begin to uncover the disturbing truth behind their twisted ordeal. This gripping horror thriller takes the concept of human experimentation to terrifying new heights, examining the lengths to which some will go in pursuit of entertainment – and profit.

  • Bride of Re-Animator
    20
    Fabiana Udenio, Jeffrey Combs, Kathleen Kinmont
    30 votes

    In this sequel to the cult horror classic Re-Animator, the deranged doctor returns with a new, even more twisted scheme to conquer death: the creation of a female companion for his monstrous first experiment. But as he sets about assembling his grotesque bride from a patchwork of body parts, he unwittingly unleashes a torrent of bloody chaos that threatens to overwhelm him. With its wild mix of gory shocks, dark humor, and macabre delights, this campy horror-comedy offers a wickedly entertaining look at the sinister consequences of unchecked scientific ambition.

  • Species II
    21
    Michael Madsen, Natasha Henstridge, Marg Helgenberger
    33 votes

    In this pulse-pounding sequel to the hit sci-fi horror film, a group of astronauts returns from a mission to Mars bearing a deadly extraterrestrial virus that transforms its host into a monstrous, alien-human hybrid. As the contagion spreads, humanity's only hope for survival lies in the hands of a crack team of specialists tasked with tracking down the infected and eliminating the threat before it can consume the Earth. A thrilling ride through the horrors of biological warfare and unchecked scientific ambition, this action-packed film offers up a terrifying vision of humanity on the brink of apocalypse.

  • Soylent Green
    22
    Charlton Heston, Edward G. Robinson, Leigh Taylor-Young
    35 votes

    In a dystopian future where overpopulation, pollution, and resource depletion have plunged the Earth into crisis, a detective unravels the horrifying secret behind the world's most popular food: Soylent Green. As he delves deeper into the conspiracy, he must confront the ghastly truth about humanity's desperate attempts to sustain itself in the face of impending collapse. A chilling exploration of environmental degradation and the terrifying lengths to which mankind will go in the name of survival, this classic sci-fi horror film serves as a sobering reminder of the consequences of uncontrolled scientific experimentation.

  • The Boys from Brazil
    23
    Gregory Peck, Laurence Olivier, James Mason
    22 votes

    A relentless Nazi-hunter uncovers a terrifying plot to resurrect the Third Reich by cloning Adolf Hitler, masterminded by a group of exiled war criminals in South America. As he races against time to thwart their diabolical scheme, he must confront the chilling possibility that history could be doomed to repeat itself. A gripping fusion of historical thriller and sci-fi horror, this unsettling film offers a chilling exploration of the ethics of cloning and the unsettling legacy of WWII-era experimentation.

  • The Lazarus Effect
    24

    The Lazarus Effect

    Mark Duplass, Olivia Wilde, Donald Glover
    87 votes

    A group of researchers' groundbreaking experiments with resuscitation technology spiral out of control when they successfully revive a deceased colleague, unleashing a malevolent and supernatural force that threatens to consume them all. As they struggle to contain the unleashed evil, they must confront the chilling ramifications of their groundbreaking work and the perilous consequences of playing God. A tense and atmospheric blend of science fiction and horror, this chilling film offers a haunting exploration of the ethical boundaries of medical research and the eternal mysteries of life and death.

  • The Host
    25
    Song Kang-ho, Byun Hee-bong, Park Hae-il
    38 votes

    In this acclaimed monster movie, a bizarre creature born from the eco-disaster wreaked by a reckless laboratory emerges from Seoul's Han River to terrorize the city and abduct a young girl. As her dysfunctional family bands together to save her from the monster's clutches, they must contend with government agents and their own personal demons to uncover the truth behind the creature's origins. A thrilling blend of action, horror, and social commentary, this chilling film offers a scathing indictment of environmental negligence and the hazards of unchecked scientific progress.

  • From Beyond
    26
    Jeffrey Combs, Barbara Crampton, Ted Sorel
    60 votes

    When a brilliant scientist's experiments with interdimensional communication inadvertently open a doorway to a terrifying alternate reality, he and his colleagues find themselves caught in a nightmare world populated by grotesque creatures and unimaginable horrors. As they struggle to survive and find a way back home, they must confront the grim consequences of their reckless quest for knowledge. A spine-tingling descent into Lovecraftian cosmic horror, this chilling film explores the dangers of unchecked scientific curiosity and mankind's fragile place in the universe.

  • Fiend Without a Face
    27
    Marshall Thompson, Michael Balfour, Kynaston Reeves
    18 votes

    An ambitious scientist's experiments with telekinesis unintentionally give rise to invisible, brain-sucking creatures that terrorize a small town. As the death toll rises, the desperate locals must band together to stop the fiends before they consume everyone in their path. A thrilling blend of classic monster movie tropes and Cold War-era paranoia, this chilling horror film offers a cautionary tale about the dangers of scientific hubris and meddling with the unknown.

  • Raw
    28

    Raw

    Garance Marillier, Ella Rumpf, Rabah Nait Oufella
    32 votes

    When a sheltered vegetarian veterinary student is forced to consume animal flesh as part of a hazing ritual, she develops a gruesome hunger for human flesh that threatens to consume her very identity. As her insatiable cravings escalate, she finds herself drawn into a macabre world where food, sex, and violence collide, forcing her to confront the horrifying truth about her own nature. A visceral exploration of the human appetite for taboo, this gut-churning body horror film serves up a grisly feast for fans of extreme cinema.

  • The Human Centipede (First Sequence)
    29
    Ashley C. Williams, Dieter Laser, Akihiro Kitamura
    104 votes

    In this notorious body horror film, a deranged surgeon kidnaps three tourists and subjects them to a gruesome experiment, sewing them together mouth-to-anus to create a single, grotesque organism. As the horrific reality of their situation sinks in, the victims must grapple with the full extent of their captor's sadistic depravity and fight for their survival. With its unflinching brutality and stomach-churning premise, this shocking film serves as a horrifying exploration of human cruelty and the twisted depths of medical experimentation.

  • Tusk
    30

    Tusk

    Michael Parks, Justin Long, Haley Joel Osment
    30 votes

    In this twisted horror-comedy, a self-obsessed podcaster finds himself the unwitting subject of a demented man's grotesque experiment, as he is surgically transformed into a monstrous walrus-human hybrid. As his friends race to find and rescue him, the podcaster must come to terms with his hideous new form and confront the deranged captor who holds his life in his hands. A bizarre and unsettling exploration of the boundaries between man and beast, this darkly humorous film serves as a savage critique of our human obsession with body modification and the darker aspects of our fascination with the animal kingdom.