Are these thriller or action movies? I'm not big on action movies, BP.
I adore thrillers, however.
More action than thriller.
Basic premise...
Old Boy - Guy gets abducted and is thrown into a hotel room that is basically a prison for him. Locked in it for YEARS. He is let out but is told that he has so long to find out who put him in there for years and why but if he does not find out his girl he has not seen in years will be killed. He goes on from there to find out why and there is a twist in it that throws you for a loop, even if you figure it out it is still twisted. As I noted...great fight scene in it.
I saw the Devil - A guy that was a cop or Korean version of FBI has his wife killed by a serial killer. He goes on the hunt for the serial killer but he just does not go to kill him or imprison him...he is going to do some punishment. This is considered both a action and psychological thriller.
Neither are ghost or paranormal movies.
However if you like some good Korean films...these two are almost always on the top of the best Korean Movies list you will find.
If you want something a little more twisted...Cold Fish might be for you ...gory and weird.
You might also like Suicide Club - Groups of kids start committing suicide and nobody knows why so a detective goes on the mission to try and figure it out.
For a horror type twisted movie...check out Audition...a few scenes in it that are really twisted.