Recommend me a good psycho/action thriller

I've been searching for a long time for a good psycho thriller or an action thriller or a twisted psychological thriller. Shortly I'm looking for something dark and twisted :) If it has a psychopath in it it's a huge plus :) Here's a few examples: Lesson of the Evil Hwayi: A Monster Boy Brain Man Hard Romanticker I Loved them all, so if you could recommend me something similar I'd be thrilled! Country of origin doesn't matter :)

Maybe Liar Game?

I've watched it but it was great :)

Story of A Man http://mydramalist.com/205-a-mans-story

I can recommend 2 good psycho/thriller movies you haven't got on your list:

1. I Saw the Devil (Choi Min-Sik is a complete psycho in here lol)
http://mydramalist.com/1063-i-saw-the-devil

2. The Chaser
http://mydramalist.com/1538-the-chaser

I will recommend

I saw the devil - Choi min shik is a ****ing psycho and lee byung hun is a total badass hero.
http://mydramalist.com/1063-i-saw-the-devil

The terror live - also great, it is a one room thriller between newscaster( ha jung woo) and a psycho audience who threaten him.
http://mydramalist.com/7240-the-terror-live

The chaser - ha jung woo as psychopath killer
http://mydramalist.com/1538-the-chaser

Confession of murder is very intriguing movie about a criminal that confess his crime after so many years but it is not as simple as that. It come with some actions and thrilling moments
http://mydramalist.com/3907-confession-of-murder

Hide and seek is another great mystery thriller movie, about two families who believe there is strangers that hiding in their home and they struggle to find out the strangerss.
http://mydramalist.com/7393-hide-and-seek

The traffickers is about human organ trafficking in the ship with suspense and intriguing storyline.
http://mydramalist.com/4954-the-traffickers