Instead of using the footage from Sorority House Massacre (1986), the title that this movie is officially the sequel to, clips from The Slumber Party Massacre (1982) are used instead to explain the backstory for this movie.
There is a mental institution called Hockstedter Mental Hospital. Hockstedter was the name of the villian in Sorority House Massacre II (1990) and Hard to Die (1990).