Trigger Man
Jesus, Ti West is the MASTER of intense horror. Movie is about a dude being hunted in the woods. The pacing is slow but the build up, like House of the Devil, just has you on the edge of your seat afraid to look because any moment something is going to happen. The first hour is masterful in that sense. And when it gets going it kind of goes all over the place for a bit, but then the last 30 mins are nerve-racking again. The camera sticks and stays right behind the main characters head so you only see what he's seeing and that narrow vision makes it tense as hell. The only thing is that coming from all these FPS games with snipers, it's frustrating that the guy leaves himself open so much, but he's not supposed to be a military guy or anything so it's understandable.
Not much story and probably only a few dozen lines in the entire film, but it's just soaked with atmosphere and intense as it gets. Worth watching for horror films who enjoy horror for the fear factor and not for the money shots of violence.