The blood, sweat and tears of geniuses!
The Evil Dead is everything a horror movie fan can wish for. It is also the ideal place to start for the uninitiated. Contrary to most films of its genre, it never relies on filler and barely exposes its protagonists. It makes its way to the trigger event quickly and soon plunges the story into somewhat of an extended third act. It’s frightening, engaging, it’s a little bit funny and very gory.
Some camera shots used have never been seen before and rely on creative rigs that director and writer Sam Raimi pulled out of a hat. His magic doesn't stop there. He gathered the right crew to produce a combination of claymation, latex, animal viscera and make-up that looks nothing like other films of the early decade. This is a good example of accessible experimental cinema.
Take The Exorcist, inject a generous dose of franticness, crank the violence to a maximum, get rid of the dialogue and you get this superficial gem! The Evil Dead is flawed when it comes to special effects, but they involve such unique cinematographic innovations that they are genuinely disorienting and terrifying, regardless. It is the quintessential horror movie and one of the best ever made.