Beware the Slenderman (2016) is a Documentary, Crime film that follows in this horrifyingly modern fairytale lurks an online Boogeyman and two 12-year-old girls who would kill for him. The entrance to the internet quickly leads to its darkest basement. How responsible are our children for what they find there? Currently, you can watch Beware the Slenderman on HBO Max, HBO Max Amazon Channel, Amazon Video, Apple TV Store. Streaming availability may vary by country and platform over time. It has a user rating of 6.5 out of 10 from 263 votes. Fans of documentary movies may also want to explore similar titles below.