Top 10 Most Disturbing Movies of All Time That You Should Probably Never Watch

Top 10 Most Disturbing Movies of All Time That You Should Probably Never Watch

There is a dark corner of cinema that most people do not know exists.

Not scary movies. Not violent action films. Something far more extreme — films so deliberately disturbing, so psychologically brutal, so completely without mercy for the viewer that they have built legendary reputations simply by existing.

These are the movies that get passed around in whispers online. The ones people dare each other to finish. The ones that have made grown adults turn off their screens halfway through and stare at the ceiling wondering why they started.

We are not recommending these films. That is the whole point of this article. We are warning you — because if you go looking for them out of curiosity, you should at least know exactly what you are walking into.

Consider yourself warned. Every single one of these is real.

1. Cannibal Holocaust (1980)

Genre: Horror | Rating: Banned in several countries

This Italian film from director Ruggero Deodato is widely considered the most controversial film ever made — and there is genuine historical weight behind that claim.

Shot in a found-footage style years before The Blair Witch Project made it mainstream, it follows a documentary crew that travels deep into the Amazon to film indigenous tribes and never returns. A rescue mission recovers their footage. What is on that footage is the film.

When Cannibal Holocaust premiered, Deodato was actually arrested by Italian authorities on suspicion of murder because the deaths in the film looked so real. He had to bring his actors into court to prove they were still alive.

The film contains real animal killings — a fact that has made it morally indefensible to many viewers regardless of any artistic argument. It was banned in over 50 countries. It remains deeply disturbing nearly fifty years later. Find it in our horror movies section if you dare — but be absolutely sure you want to before you click.

2. Martyrs (2008)

Genre: Horror | Rating: 18+

French filmmaker Pascal Laugier made a film that divides everyone who watches it into two groups — those who think it is a profound and devastating piece of art, and those who never fully recover from it.

Martyrs begins as what appears to be a revenge thriller. A young woman tracks down the family she believes tortured her as a child. What happens in the second half of the film is something else entirely — a philosophical horror experience about the nature of suffering so extreme and relentless that it has made people physically ill.

It is genuinely one of the most brutal viewing experiences in mainstream horror cinema. Multiple critics who cover the genre professionally have said they will never watch it again. The French New Extremity movement produced several challenging films — Martyrs is the most extreme of all of them.

It is available in our horror section. We are not stopping you. We are just telling you the truth first.

3. Salò, or the 120 Days of Sodom (1975)

Genre: Drama | Rating: Banned in multiple countries

Pier Paolo Pasolini’s final film — he was murdered before it was released — is one of the most studied and most disturbing films in cinema history.

Set in Fascist Italy during World War II, it follows four powerful men who abduct a group of teenagers and subject them to increasingly horrific acts over 120 days. The film is based on a novel by the Marquis de Sade but uses its premise as a brutal political allegory about power, corruption and the dehumanisation of ordinary people under totalitarian control.

Salò has been studied in film schools, exhibited in art galleries, and discussed at the highest levels of academic film theory. It has also been banned, confiscated, and prosecuted in courts around the world.

It is undeniably significant as a piece of cinema. It is also one of the most genuinely unwatchable experiences available to a viewer. The kind of drama that stays with you for all the wrong reasons.

4. Irreversible (2002)

Genre: Thriller / Drama | Rating: 18+

Gaspar Noé is one of cinema’s most provocative directors. Irreversible is his most challenging film — and the reason his name still causes strong reactions twenty years later.

The film runs backwards. It opens with its most violent scene — a fire extinguisher used as a weapon in a nightclub in a sequence so brutal that it caused mass walkouts at its Cannes premiere. Later, it contains a nine-minute unbroken rape scene that many critics and filmmakers have cited as the most difficult sequence they have ever sat through.

Noé’s argument is that showing the consequences before the cause forces you to experience trauma the way victims do — you know the outcome and watch helplessly as the events lead there anyway.

Whether that justifies the film is a conversation that has been ongoing for twenty years. What is not debatable is that it is one of the most formally brilliant and emotionally catastrophic thriller films ever made. Monica Bellucci and Vincent Cassel both give extraordinary performances in a film many people watch once and never return to.

5. The Human Centipede (2009)

Genre: Horror | Rating: 18+

Tom Six made a film with a single unforgettable premise — and that premise is the entire reason the film exists.

A deranged German surgeon kidnaps three tourists with the goal of surgically connecting them into a single organism. The concept is so viscerally repulsive that knowing the plot is almost as disturbing as watching it.

What is genuinely surprising is that The Human Centipede is, by the standards of what it could have been, relatively restrained. The horror is almost entirely psychological — the knowledge of what has happened and what will happen. Dieter Laser as the surgeon Dr. Heiter is a genuinely unsettling screen villain.

Two sequels followed — The Human Centipede 2 and The Human Centipede 3 — and both pushed the concept to places the first film deliberately did not go. The first is curious. The sequels are truly extreme. You have been warned. The original is available in our horror movies section.

6. A Serbian Film (2010)

Genre: Horror | Rating: Banned in multiple countries

This is the film that people who discuss extreme cinema always eventually arrive at. The one that ends the conversation.

A Serbian Film follows a retired adult film actor who is lured back into the industry by the promise of easy money — and slowly discovers the nature of the project he has agreed to participate in. The film escalates in a direction that has no precedent in mainstream cinema.

Director Srdjan Spasojevic has argued that the film is a metaphor for life in Serbia under brutal political regimes — a country violated by its own leaders, its own history, its own government. Critics who accept that reading acknowledge it as one of the most extreme pieces of political cinema ever made.

It was banned in Spain, Norway, Germany, Australia and several other countries. Many streaming platforms refuse to host it entirely. It is included on this list specifically because if you search for it out of curiosity, you genuinely need to understand what you are about to experience. This is not a thriller you stumble into lightly.

7. Antichrist (2009)

Genre: Horror / Drama | Rating: 18+

Lars Von Trier is one of the most brilliant and most maddening filmmakers alive. Antichrist is his most extreme work.

Willem Dafoe and Charlotte Gainsbourg play a couple who retreat to an isolated cabin in the woods after the death of their infant child. What begins as grief therapy descends into psychological horror and graphic violence that left Cannes audiences simultaneously outraged and fascinated.

Von Trier made the film during a severe depressive episode and has described it as born from a place of genuine psychological darkness. That context does not make it easier to watch — but it does explain the film’s relentless, suffocating despair.

Charlotte Gainsbourg won Best Actress at Cannes for a performance that required extraordinary courage. The film is available on multiple platforms and sits comfortably among the top-rated controversial dramas in world cinema history.

8. Men Behind the Sun (1988)

Genre: Historical Horror | Rating: Banned in several regions

This Chinese film about the activities of Unit 731 — the Japanese biological warfare unit that conducted experiments on prisoners of war during World War II — is based on historical fact. That is what makes it so deeply disturbing.

The film depicts medical experiments conducted on human subjects in graphic detail. It contains documentary footage of actual autopsies. It was made with the stated purpose of ensuring that the atrocities of Unit 731 would not be forgotten or minimised.

The historical importance of the subject matter is genuine. The actual content of the film is among the most difficult viewing experiences in cinema. It is the kind of drama that exists at the intersection of historical document and extreme cinema. Watch with full awareness of what you are choosing to see.

9. Requiem for a Dream (2000)

Genre: Drama | Rating: 18+

Here is the one film on this list that is genuinely, unquestionably great — and also one of the most psychologically crushing viewing experiences in cinema.

Darren Aronofsky’s study of addiction follows four people whose lives are consumed and destroyed by different substances and compulsions. Ellen Burstyn was nominated for the Academy Award for a performance that is widely considered one of the greatest in film history. Jared Leto, Jennifer Connelly and Marlon Wayans give career-defining work alongside her.

The final twenty minutes of Requiem for a Dream is one of the most relentless, devastating sequences in cinema. It is not violent in the typical sense — it is simply the complete collapse of four human beings in real time.

Many people who love this film say they will never watch it again. It is that good and that hard. One of the highest-rated films of all time on IMDB and one of the most genuinely important films ever made about addiction. Watch it once. You will understand why once is enough.

10. I Spit on Your Grave (1978)

Genre: Thriller / Horror | Rating: 18+ | Banned in multiple countries

Originally titled Day of the Woman, this film was so extreme on its original release that the legendary critic Roger Ebert called it “a vile bag of garbage” and gave it zero stars. It was banned in several countries and seized by police in others.

A woman renting a cabin in the countryside is attacked by a group of local men. The film depicts her assault at brutal and extended length. What follows is her systematic revenge against each attacker.

The film has generated genuine critical debate for nearly fifty years. Feminist film scholars have argued that despite its content — or perhaps because of it — the film is actually a powerful statement about female survival and retaliation. Others argue that the first half makes any artistic redemption impossible.

A 2010 remake and multiple sequels followed, suggesting the story continues to resonate with audiences regardless of its extreme content. It sits permanently on lists of the most controversial thriller films ever made.

A Final Word Before You Go Looking

Every film on this list is real. All of them are available somewhere online.

Some of them are genuinely important works of art that happen to be extremely difficult to watch. Some are purely designed to shock. A few exist in a category that has no clean description.

What they all share is the ability to leave a mark. These are not films you watch and forget. Whatever you feel during and after them — that feeling tends to stay.

You have been warned honestly. What you do with that information is entirely up to you.

Find more extreme horror, thriller and drama films across the full O2Movie library — where we keep the full collection updated with the latest releases and classic titles.

Frequently Asked Questions

Q: What is the most disturbing movie ever made? A: Most film critics and extreme cinema fans point to A Serbian Film, Salò or Cannibal Holocaust as the most extreme films ever made. Each one disturbs for different reasons.

Q: Are these movies available to watch online? A: Some are available on mainstream platforms. Others have been banned or restricted. Check the full movies section on O2Movie for what is currently available to stream.

Q: Why would anyone watch these films? A: Many people are drawn to extreme cinema out of curiosity, academic interest or a desire to understand what pushes the boundaries of the medium. Some of these films, like Requiem for a Dream and Irreversible, are genuinely critically acclaimed despite their difficulty.

Q: Is Requiem for a Dream really that bad? A: It is not bad — it is extraordinary. But it is one of the most emotionally crushing films ever made. Many viewers find it deeply upsetting. It earns its place on this list through sheer psychological intensity rather than graphic content.

Q: What is the most banned movie of all time? A: Cannibal Holocaust holds the record, having been banned in over 50 countries. A Serbian Film and Salò are close behind in terms of global restrictions.