Some of the more obscure giallos are frighteningly sleazy and violent (and misogynist!), such as Black Angel (aka Arabella) and So Sweet, So Dead.
You might want to explore some Asian Category III films such as The Untold Story, Ebola Syndrome, Doctor Lamb, Run and Kill, Red to Kill, The Flower The Flesh & The Blood, Naked Blood and Evil Dead Trap.
More recently, the August Underground movies are creating quite a stir in their realism.
__________________
|