There’s something uniquely spine-chilling about horror movies based on true events. It’s not just the ghostly shadows or creepy whispers — it’s the thought that this actually happened to someone. If you’re on HBO Max in July 2025 and craving horror with a real-world edge, you’re in luck. Here’s a handpicked list of the top 5 horror films based on true stories, now streaming.
1. The Conjuring (2013)
Based on:Rhode Island Perron family ghost haunting (1971)
Let’s start off with a classic. The Conjuring is an absolute must-see for any horror buff — particularly as it’s based on a real-life paranormal investigation conducted by Ed and Lorraine Warren, two of the most renowned demonologists on the planet.
The Perron family leased a farmhouse in Harrisville, Rhode Island, and were subjected to supernatural events. Director James Wan gets the sense of dread of this true haunting just right without crossing the line, and the result is creepy and pleasantly realistic.
Why Watch: Terrific performances, creepy atmosphere, and a downright terrifying backstory.
Streamable in HD with bonus behind-the-scenes interviews on HBO Max.
2. The Exorcism of Emily Rose (2005)
Based on: True-life case of Anneliese Michel (Germany, 1976)
Courtroom thriller combined with possession horror — this film draws from the real-life case of Anneliese Michel, a German woman whose alleged demonic possession led to one of the most notorious trials of modern times.
This reworking follows a priest on trial for negligent homicide after a failed exorcism. Instead of depending on jump scares, the movie explores religion, mental illness, and the thin line between science and faith.
Why Watch: A thinking person’s horror movie — with phenomenal acting.
Streaming in full HD with director commentary and subtitles.
3. The Amityville Horror (2005)
Based on: The DeFeo murders, Lutz family, Amityville, New York (1974)
This horror tale is the true account of the Lutz family, who purchased a house where a ghastly family massacre had only occurred a year earlier. They were gone in 28 days — describing horrifying supernatural experiences.
The Amityville house is the most famous “haunted house” in the US, with countless books, documentaries, and film adaptations. HBO Max has the 2005 version with Ryan Reynolds — and it’s one of the most emotionally resonant versions of the tale.
Why Watch: Mixes up haunted house fright with real tragedy and intrigue.
Accompanies a companion mini-doc about the true case files.
4. Veronica (2017)
Based on: Vallecas, Madrid, Spain (1991)
This Spanish horror film was a surprise internet sensation — and it’s actually about a true 90s Madrid police report. Verónica, the young woman in question, supposedly played around with a Ouija board and inadvertently let some sort of monstrous entity into her house.
What makes Veronica so intense is its emotional storyline. It’s not about terror — it’s about a young woman dealing with loss, responsibility, and hidden forces that are all far beyond her reach.
Why Watch: Atmospheric, emotional, and based on one of the few supernatural cases to have a police report.
Currently streaming with English and Spanish subtitles.
5. Deliver Us from Evil (2014)
Based on: NYPD officer Ralph Sarchie’s real-case files
Indeed, a police officer who solves paranormal crimes. Sounded fictional? It is not. Officer Ralph Sarchie documented his real-life experience with inexplicable and terrifying cases of working in the Bronx.
This film follows his foray into the occult — a crime drama with supernatural horror. It touches briefly on how evil is not only reserved for myths and horror fiction — it lingers in the ordinary.
Why Watch: A highly unusual horror film based on real-life police cases. Raw, gritty, and fast-paced.
Streaming with extras such as interviews with the actual Ralph Sarchie.
Tip: Watch With Lights Out (But Maybe Have a Nightlight Available)
All these films have one thing in common — they don’t rely on monsters or blood. Their power lies in the fact that what they show is based on true encounters, witness accounts, and tragic events. That is why they remain in your head.
Whether you’re a horror enthusiast or just dishing out your courage, these five films are a scary but cerebral experience. And the cherry on top? They’re **just a click away** on HBO Max in July.
Horror from real stories slices differently. It lingers. It makes you wonder what you would do in those situations. And with HBO Max’s rich catalog of horror, the stories are there to relive, revisit, or uncover for the first time.
Grab your popcorn, dim the lights, and dive in — just maybe… leave Ouija boards in the attic.
