The Island

Suggestions:

The Long Night Those Among Us Blood Orgy of the Leather Girls Echcharikkai Daughters of Darkness

John Shum leads an expedition to an supposedly deserted island only to find out that it's inhabited by a group of seriously demented characters,lead by Peter Chan Lung.This is a family that stays together,slays together and when the youngest one is refused in marriage to one of the young girls of the troupe they turn into savage maniacs.