The — Last House On The Left

It remains one of the most polarizing films ever made, often cited as the pinnacle of the "Rape and Revenge" subgenre.

A 2009 version modernized the gore but arguably lost the raw, nihilistic power of the original. The Last House on the Left

The killers unknowingly seek refuge at the home of Mari’s parents. Upon discovering the truth, the parents transform into "civilized" monsters to enact revenge. It remains one of the most polarizing films