The Hellraiser franchise is one of the less talked about in the horror genre. One could argue that the series is criminally underrated. It's among one of the genre's book-to-movie adaptations that brings the scariest elements of the story to the screen with a lot of gore. Still, the franchise has one of the most confusing timelines.
Source:https://www.cbr.com/hellraiser-movie-watch-order/