Games like ParanormalHK
Games like ParanormalHK include MiSide, Outlast 2, Outlast, Paper Dolls: Original /, and Scorn. We matched them by the tags players give ParanormalHK on Steam (Horror, Sexual Content, Dating Sim, Nudity, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

MiSide
Shared: Sexual Content · Horror · Psychological Horror

Outlast 2
Shared: Horror · Psychological Horror · First-Person

Outlast
Shared: Horror · Psychological Horror · First-Person

Paper Dolls: Original /
Shared: Horror · Thriller · Adventure

Scorn
Shared: Horror · Sexual Content · Nudity

Little Nightmares II
Shared: Horror · Adventure · Psychological Horror

White Day: A Labyrinth Named School
Shared: Horror · Sexual Content · Nudity

Poppy Playtime
Shared: Horror · Psychological Horror · Puzzle

DEVOUR
Shared: Horror · Sexual Content · Multiplayer

Phasmophobia
Shared: Horror · Psychological Horror · Multiplayer

Inside the Backrooms
Shared: Horror · Multiplayer · Psychological Horror

Escape the Backrooms
Shared: Horror · Multiplayer · Psychological Horror

Resident Evil Village
Shared: Horror · Sexual Content · First-Person

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Nudity

Buckshot Roulette
Shared: Horror · Multiplayer · First-Person

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Multiplayer

Ready or Not
Shared: Horror · Multiplayer · Psychological Horror

Clive Barker's Hellraiser: Revival
Shared: Sexual Content · Horror · Nudity

Hand Simulator
Shared: Multiplayer · Funny · Psychological Horror

Little Nightmares
Shared: Horror · Adventure · Psychological Horror

Backrooms: Escape Together
Shared: Horror · Multiplayer · Psychological Horror

Lethal Company
Shared: Horror · Funny · Psychological Horror

Blood and Bacon
Shared: Horror · Multiplayer · Funny

Atomic Heart
Shared: Sexual Content · Horror · Adventure