"Deadgirl" is a horror film that explores dark themes, including obsession and moral ambiguity, through the story of two high school boys who discover a woman tied up in an abandoned asylum. While it has garnered a cult following for its provocative content, opinions on the "scariest movie ever" vary widely. Many consider films like "The Exorcist," "Hereditary," or "Psycho" as contenders for that title due to their intense psychological horror and lasting impact on audiences. Ultimately, the scariest movie is subjective and depends on personal fears.

"Deadgirl" is not based on a true story; it is a fictional horror film released in 2008. The film revolves around two high school boys who discover a girl held captive in an abandoned mental institution, leading to disturbing moral dilemmas. As for "Nefarious," it is also a fictional horror-thriller film released in 2023, centered around a death row inmate claiming to be possessed. While both films explore dark themes, they are not based on real events.

"Deadgirl" is available for streaming on platforms like Amazon Prime Video and Vudu, where you can rent or purchase it. Additionally, it may be available on services like Tubi or other on-demand platforms depending on your region. Always check the specific streaming service in your area for availability, as it can vary.

"Deadgirl" is not based on a true story; it is a fictional horror film released in 2008. The film revolves around two high school boys who discover a naked woman tied up in an abandoned mental institution and uncover dark themes of obsession and morality. While it explores disturbing subjects, the narrative and characters are entirely created for the film and do not reflect real-life events. The film has garnered attention for its controversial themes and portrayal of horror elements.