The Amityville Horror story is said to be true by some, but it's hard to verify. Some parts could be real, but others might be made up for dramatic effect or to sell the story.
Yes, it is based on a supposed true story. The events in the Amityville Horror were said to have occurred in a house in Amityville, New York in 1974. A family, the Lutz family, claimed to have experienced terrifying paranormal activities after moving into the house where a previous murder had taken place. However, there have been many debates and investigations that question the authenticity of their claims.
Well, it's presented as a true story. The 2017 version, like the previous ones, is rooted in the events that allegedly took place in the Amityville house. There were stories of cold spots, objects moving on their own, and a feeling of dread. While some aspects might have been exaggerated for the sake of the horror genre, the core idea of it being based on real - life events remains, although it's still a highly debated topic.
Some believe it was based on real events, but there's a lot of skepticism. The story has elements that might have been exaggerated or fictionalized for effect.
The story of the Amityville Horror has elements that are claimed to be real, but many aspects have been questioned and investigated. There's no definitive proof that it's a 100% true account.