Games like Spirit Hunter: NG
Games like Spirit Hunter: NG include 月影魅像-解放之羽-, Tiny Bunny, YOU and ME and HER: A Love Story, The Song of Saya, and Raging Loop. We matched them by the tags players give Spirit Hunter: NG on Steam (Adventure, Visual Novel, Horror, Violent, and Gore): closest matches first, and among equally close ones the better-known games.

月影魅像-解放之羽-
Shared: Visual Novel · Adventure · Sexual Content

Tiny Bunny
Shared: Visual Novel · Horror · Gore

YOU and ME and HER: A Love Story
Shared: Visual Novel · Adventure · Anime

The Song of Saya
Shared: Visual Novel · Gore · Horror

Raging Loop
Shared: Visual Novel · Adventure · Gore

AI: The Somnium Files
Shared: Visual Novel · Adventure · Anime

Sakura no Mori † Dreamers
Shared: Adventure · Visual Novel · Anime

The House in Fata Morgana: A Requiem for Innocence
Shared: Adventure · Visual Novel · Violent

Muv-Luv Alternative
Shared: Visual Novel · Anime · Gore

Doki Doki Literature Club Plus!
Shared: Visual Novel · Anime · Sexual Content

Scorn
Shared: Horror · Gore · Sexual Content

PARANORMASIGHT: The Mermaid's Curse
Shared: Adventure · Visual Novel · Horror

Higurashi When They Cry Hou - Ch.6 Tsumihoroboshi
Shared: Visual Novel · Adventure · Horror

Higurashi When They Cry Hou - Ch.5 Meakashi
Shared: Visual Novel · Adventure · Horror

The Letter - Horror Visual Novel
Shared: Visual Novel · Horror · Adventure

PARANORMASIGHT: The Seven Mysteries of Honjo
Shared: Adventure · Visual Novel · Horror

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

Higurashi When They Cry Hou - Ch.7 Minagoroshi
Shared: Adventure · Visual Novel · Horror

Dead by Daylight
Shared: Horror · Gore · Violent

Danganronpa: Trigger Happy Havoc
Shared: Visual Novel · Anime · Adventure

Milk inside a bag of milk inside a bag of milk
Shared: Visual Novel · Horror · Adventure

Wonderful Everyday Down the Rabbit-Hole
Shared: Visual Novel · Violent · Sexual Content

Corpse Party: Book of Shadows
Shared: Horror · Visual Novel · Violent

Resident Evil Village
Shared: Horror · Sexual Content · Gore