Kill List (2011) - Thriller/Horror
'Events take a darker turn as a contract killer (Neil Maskell) and his business partner (Michael Smiley) carry out a new assignment.'
Violent and a bit confusing. Never quite sure where it was leading to, the ending leaves more than a few stones unturned.
I've seen a couple of explanations of it and both plausible but, watch it and see for yourself.
Black (2015) - Crime/Drama (Belgian and subtitled)
'A young girl (Aboubakr Bensaihi) in a gang faces a choice between loyalty and love when she falls for a boy (Sanâa Alaoui) from a rival gang.'
A graphic, violent and in some scenes disturbing, variation of the Romeo and Juliet theme.
Intense and tragic, although the character portrayals might mean you favour one over the other?