Though I've only recently seen it, I can state without reservation that The House of the Devil (2009) is one of the best horror films of the decade. It establishes Ti West, who wrote, edited, and directed the picture, as American horror cinema's most exciting, smart filmmaker. No "torture porn" or gratuitous gore here, just real acting, writing, and directing in service of a story that inexorably builds to a fever pitch and honors horror directors of yesteryear. West's clearly fond of Rosemary's Baby and The Shining, amongst other horror gems from the 1970s and 80s that prioritized setting, lighting, and camera movement over cheap scares. I haven't been this impressed by a horror film since Let the Right One In.