The Texas Chain Saw Massacre (1974)

Considered the first slasher film of the 1970s, it follows a group of friends that fall victim to a deranged family of cannibals in the isolated Texas countryside, unleashing a horrifying chain of events. This low-budget film, capable of offering genuine horror with raw and practical effects, revolutionized the horror genre and has become an absolute classic that spawned countless remakes and cliches.