10 Great Horror Movies Over 2 Hours Long

10. I Saw The Devil

In I Saw the Devil, a serial killer murders a pregnant woman, compelling her fiance, who happens to be a government agent, to hunt him down. Despite its straightforward premise, this Korean masterpiece is anything but formulaic. Without giving anything away, the film feels like its wrapping up within the first hour, giving the viewer little idea of where the story is going. Every time you think you have I Saw the Devil figured out, it goes in a completely different direction, which keeps the viewer utterly engaged despite the film's length.

But it's not just the plot that is exceptional. The violence is brutally inventive to the point where you can't tell whether to gasp in horror or in awe. Some of the cinematography is so astounding, you will probably say, "How the hell did they do that?" on at least one occasion.

However, the film's greatest strength is the charismatic performance of Choi Min-sik, best-known for playing the lead role in Oldboy. The way he switches from playing the killer as carefree and charming one moment and a deranged psychopath the next is so effortless, it's like the character is played by two different actors.