A Nightmare on Elm Street (1984)

Wes Craven moved the locus of horror from the physical world into the dream state — a space where no conventional defence applies and the logic of waking life collapses entirely. Made for $1.8 million, the original film grossed $25 million and launched one of Hollywood's most durable franchises, spanning nine films and a television series. Freddy Krueger became the defining horror icon of the 1980s, and the central conceit — that falling asleep is itself a lethal act — remains one of the most psychologically effective premises in genre history.