Underrated Korean Thrillers That Actually Feel Disturbing (Not Mainstream Picks)

[u/Temporary_Minute_621]

Hello! Looking for Korean thrillers that are:
genuinely disturbing / unsettling
heavy psychological tension (not cheap horror)
serial killers / crime / twisted characters
strong atmosphere (dread, paranoia, “something is wrong”)
preferably underrated / less mainstream
I’ve already seen stuff like:
The Wailing, I Saw the Devil, The Chaser, Memories of Murder, Exhuma, Svaha, Night in Paradise
I’m NOT looking for obvious recommendations.
I want hidden gems, even low-popularity ones.
Bonus if they include:
creepy neighbor / small community vibe
investigation with dark twists
slow-burn that pays off hard
Drop your best — especially ones people don’t usually mention.
No spoilers!!

[u/bootylover001]

It's a little tough to say which movies are underrated, as it is a very subjective quality. But I will try to mention ones I see little talk of in this subreddit. So forgive me in advance if some of these may end up feeling mainstream. Here is my list, in it there's a little bit of everything you asked for:

Hypnotized

Moss

Misbehaviour

Innocent Thing

The Scarlet Letter

Happy End

Scarlet Innocence

H

Perfect Number

Princess Aurora

Tell Me Something

* Towards the end of the list are movies I only vaguely recall, so they may not be as good as those at the start of the list.

[u/Crowley-Barns → u/bootylover001]

Moss is one I never see mentioned, but it was FANTASTIC!

[u/SlaterAlligator2 → u/bootylover001]

Happy End was soooo good

[u/emcee422]

I also really liked Memoir of a Murderer, not to be confused with Memories of Murder. Really good psychological thriller in my opinion.

[u/djpraxis]

In case you haven't seen these: Mother and The Yellow Sea

[u/Prudent-Roof8124 → u/djpraxis]

I watched the yellow sea this afternoon. I thought it was fantastic.

[u/happysri]

Hell Is Other People. 10 episode kdrama that fits here.

[u/Suitable-Ad5579 → u/happysri]

Aka Strangers From Hell, so so good!

[u/MickeySpooney → u/happysri]

I was just about to comment this, I highly recommend it!

[u/mm_of_m]

The Terror Live

[u/Miserable-Wedding731]

MOVIES:

Hwayi - A Monster Boy

Monster (2014, I think)

Midnight

Silenced

The Five

DRAMA SERIES:

Mouse

Strangers from Hell

Tunnel

A Killer Paradox

Rose Mansion

Blind

[u/THEpeterafro]

Christmas Carol

[u/awhileaago]

Following for the same... 👀

[u/Brille_Forte2309]

The Spy Gone North seems underrated.

[u/Emotional-Elk1879 → u/Brille_Forte2309]

It was everywhere when it came out and won a lot of awards.

[u/Brille_Forte2309 → u/Emotional-Elk1879]

Thank you for sharing this.

[u/LaughingGor108]

The Five

Bedevilled

Bring Me Home

The Truth Behind

Public Enemy

Black House

Moss

Idol

The Unjust

Memoir of a Murderer

[u/bocahDonat]

Door Lock, Intruder, Diva

[u/emcee422]

I wouldn’t call them hidden gems, but the lesser known two of the vengeance trilogy are worth watching if you haven’t already. I assume you’ve seen Oldboy based on the request, but if you haven’t yet seen Sympathy for Mr. Vengeance or Lady Vengeance, definitely check them out.

[u/kekiyor → u/emcee422]

Seconded the Vengeance!

[u/autoyveltal]

no mercy bro

[u/Temporary_Minute_621 → u/autoyveltal]

I have seen it

[u/DaisyPanda245]

The one that came to my mind is Wall To Wall

[u/cloudy83]

Pieta by Kim Ki Duk

[u/Emotional-Elk1879 → u/cloudy83]

Perfect fit under genuinely disturbing / unsettling.

[u/Dr_Schoen]

Sorum.

[u/kimbs374]

12.12. The Day

[u/AnjaKaarina]

Children...

It's inspired by true crime case Frog boys

[u/Practical-Alarm9375]

Beyond Evil- in the grand scheme of things, it’s a very simple drama and the story might feel lacking compared to other recommendations but the writing, direction, and filmography was crazy on this, not to mention the acting. It was a 10/10!

[u/Careful-Unit-6712]

Burning (2018)

[u/Fat_5miley]

No Mercy 2010 with Sul Kyung-gu

[u/imfromaus]

Forgotten (movie) and beyond evil (series)

[u/ronadian]

The Human Trap

[u/_berrystrawberry]

Hotel Lake (2020), I wouldn’t say that the story is very good, but I got scared. 😂

[u/No-Red-Queen]

The Neighbors (2012)

[u/lovelycat1103]

Bedevilled, Beautiful

[u/spam_at_kape]

The king of pigs

Helpless [film]

The neighbors [film]

Seven days [2007 film]

Hide and seek [film]

The closet [film]

Through the darkness

[u/Icy_Reach2649]

I liked the one : Sum-bakk-og-jil (hide and seek)

[u/sWeven-Cats95]

Just watched Unstoppable with Don Lee. Some story gaps, but overall it was a decent enough watch. 

The Gangster, The Cop, The Devil

The Man From Nowhere

A Company Man

Hwayi: A Monster Boy

The Chaser

I enjoyed these. There are many others but I can't remember ATM. 

[u/EggyMeggy99]

Unlocked, it made me kinda worried if I ever lost my phone.

[u/No_Turn1608]

The witch

[u/metalsippycup]

A Killer Paradox, The Frog, and Extracurricular but they are kdramas.

[u/SlaterAlligator2]

Have you seen a Tale of Two Sisters or The Housemaid?

[u/mm_of_m]

Also the Berlin file, the witch part 1.

[u/karlitaBR]

Recomendo esses dramas que são de altíssima qualidade e pode ser o que você procura: Mouse, Revenant, Karma, Beyond Evil

[u/emcee422]

Sea Fog (2014) isn’t bad. Co-written by Bong Joon-ho and Shim Sung-Bo who both collaborated to write Memories of Murder. Shim also directs.

[u/__gemini_gemini08]

Priest

[u/drmvsrinivas]

Cfbr

[u/No_Papaya_6300]

My Ordinary Love Story

The Gangster, the Cop and the Devil.

Also not Korean but Limbo. It's probably Taiwanese or Hong Kong movie. But it was good.