Favorite Slasher thats not Mainstream

I want to know your favorite Slasher movie thats not Mainstream, Those little gem Slasher you may have found.....Here are a few I have watched recently that I have liked
1. The Prowler-WW2 vet terrorizes a town
2. The Toolbox Murders- A meintenance man gets fed up and starts killing Tenants
Both movies are true Slashers, Toolbox murders however gets my vote for more creative Kills as he has a whole toolbox full of murderous insterments

well... Halloweem easn't mainstream so that gets my vote.

i would have to say maniac or pieces are the way to go for sheer violence and brutality (which is what a good slasher movie should be about)

visiting hours
black christmas

The Keep

a blade in the dark, Bodycount, and To all a goodnight

Slumber Party Massacre is a favourite of mine.

Happy birhday to me