ARGH!!! It's "tetralogy"!!!! (Sorry, bugbear of mine!
)
I've seen the first one, and as clumsy amateurish 80s slashers go (and there were many!) it's quite involving and enjoyable. Never understood the big deal about the ending (which is well filmed), which I seem to recall was quite predictable.
My fave scenes are the ones with the awesome, crazy aunt!