Here are my personal favs:
1. Killing Stalking
2. Black mirror
3. Obey me
4. MadK
5. Ghost gate
6. Fruit of the tongue
7. Sun's blood
8. An Uncomfortable Truth
9. Feeding lamb
10. Radio storm
11. Dead man switch
12. Interview with a Murderer
13. To the sea
14. Dreadful night
15. Moritat
16. Itou-san
17. Sleepind dead
18. Hogu Hagyeongsu
19. The Pawn's Revenge
20. Blind play
21. Stalker's Game
22. Adam no Rokkotsu
23. Color Recipe
24. The Beast Must Die
25. Nii-chan (harada)
26. Checkmate tan
27. Waterside Night
28. Stockholm syndrome
29. Lima Syndrome
30. Criminal Interview
31. Double trap
32. Caste heaven
33. Murderer Llewellyn's enchanting dinner invitation
34. My little inferno
35. LOVE MURDER BASKETBALL
36. Abyss
37. OUROBOROS：ウロボロス
38. Hikizuru Oto
39. PASSION
40. Palace of Bardo
41. Dispar
42. A Tree Without Roots
43. Marionette (Cereal)
44. The foul
45. Ouji No Hakoniwa
46. Similar terms
47. Psycho young dreams
48. Sayonara, Boku no Goshujin-sama
49. My God
50. Tourou No Ori
After giving the recs I finally understood how much I love psychological bls ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄
I'll give you more recs later if you want
it's not exactly horror.. okay maybe yeah but
The beast must die
Give me psychological horror (?) like Legs That Won't Walk or Warehouse with sketchy artstyles