The Innocent Saints directed by Mario Camus 1984 (Los Santos Inocentes dirigida por Mario Camus)
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(Cría cuervos) 1975. Ana Torrent, Geraldine Chaplin - Carlos Saura - "Porque te Vas?"
Good one this, if you like this kind of thing. A chilean martial arts movie starring the enormously impressive Marko Zaror about a guy who takes revenge on the hitman who killed his pregnant wife but accidentally kills the hitman's son. The hitman then take slow revenge on the guy, again, using slo-mo and more martial arts. It's complicated - but violent, and thats the main thing.