So, if i remember correctly, the protagonist are a couple that was traveling whit a car and in the middle of nowhere the car broke down (it was really an accident ?) and they manage to search a phone to the nearest (and only) building, that happens to be a mansion.[Yeah, it’s not Rocky Horror Picture Show :p]
So they get separated in this big house and i recall that a daughter of the family, the only “normal” of the family, try to help the protagonist to escape.
What i remember mostly are a few scenes: a weird descend trought what looked like a playground slide, a scene where they found a LOT of missing person’s IDs, and the last thing i remember, not sure it’s the ending of the movie or not ** SPOILER ALERT ** , is the protagonist that are managing to escape by road, they stop a police car, they panikly managing to explain what was happening in that mansion, and it turns out that the policemen are somenthing like cousins with the head of the serial-killer family…
Thanks in advance !
Some of the details don’t match well, but it could possibly be Nothing But Trouble, a 1991 horror comedy with Dan Ackroyd, Chevy Chase, John Candy, and Demi Moore. A comedic twist on Texas Chainsaw Massacre, directed by Ackroyd. Some yuppies run a red light and are taken to appear before a creepy old judge at his creepy old mansion, where they have dinner with his creepy old family. It has been a long time since I have seen this movie, but I am pretty sure I remember a scene where they discover a lot of IDs of prior victims. After condemning them, the judge forces his victims to ride a wild rollercoaster (sort of like a slide) to their deaths.
Maybe not a perfect match, but I thought I’d at least suggest it.