Please. Make. It. Stop. As far as I'm concerned The Amityville Horror (1979) was, and should have always been, a stand alone movie that was based on the real life story of the Lutz family. However, when Hollywood has a cash cow they usually milk it to death! Such is the case of The Amityville Curse which has NOTHING to do with the original story nor the original house. The screenplay was based on a book by the same name. However, IMDB lists multiple authors which is never a good sign and usually indicates there were problems that needed to be fixed. After watching this film, I would say this is the case because the story is all over the place. At first, its a murder mystery. Then it's a supernatural thriller that's not very thrilling. Finally, it's a slasher flick. What a mess!
To make matters worse, they were on a shoestring budget so we have a director with no significant credits to his name, actors who are sometimes god-awful, and special effects that mostly consist of wind machines and lots of candles!!! There are many moments which are supposed to be terrifying but I found myself giggling constantly. I won't belabor the point so if you're tempted to watch this film on YouTube, PLEASE for the love of cinema, resist the urge. You've been warned.
For more info check out the film's entry in IMDB.