Just to add a few more (that include classics you skipped, the really popular movies that you skipped or the ones I enjoyed personally): The New World (신세계) Voice of a Murderer (그놈 목소리) Public Enemy (공공의 적) - 1, 2, 3 The Unjust (부당거래) The Chronicles of Evil (악의 연대기) The Veteran (베테랑) The Call (콜) Silenced (도가니) Hide and Seek (숨바꼭질) Princess Aurora (오로라공주) Escape From Mogadishu (모가디슈) The Point Men (교섭) The Neighbors (이웃사람) Bedevilled (김복순 살인사건의 전말) Confidential Assignment (공조) - 1, 2 The Witch (마녀) - 1, 2 The Night Owl (올빼미) Steel Rain (강철비) - 1, 2 Holiday (홀리데이) Nowhere to Hide (인정사정 볼 것 없다) Thirst (박쥐) The Housemaid (하녀) Moebius (뫼비우스) Happy End (해피엔드) The Roundup (범죄도시) - 1, 2 The Tunnel (터널) Since you mentioned thrillers that turn more in the horror direction, I would add The Rampant (창궐) R-Point (알포인트) Epitaph (기담) Whispering Corridors (여고괴담) Living Death (불신지옥) Into the Mirror (거울속으로) Otherwise, I would look for the following (generally fail-proof) directors and actors: Directors, Bong Junho, Park Chanwook, Kim Kiduk, Lee Changdong, Kim Jiwoon Actors: Ha Jeongwoo, Song Kangho, Jeon Doyeon, Hwang Jeongmin, Ryu Seungbeom, Jeong Jaeyoung, Don Lee Answer from Queendrakumar on reddit.com