Ah, 1985. It was a good year. I don't remember a lot about it, but it had to have been a good year. The year before we all got "Gremlins", which then spawned a series of copycat films, all with their own twist. One of the better ones? "Ghoulies".
"A young man and his girlfriend move into an old mansion home, where he becomes possessed by a desire to control ancient demons." - IMDB.com
Not a lot there, huh? Well...that is because that is pretty much the film. Dude gets possessed. Dude conjures up ancient impish demons. Impish demons kill. Stop the impish demons. Save the girl. End of story. However, it is a fun film.