Games like Nightshade
Games like Nightshade include Amnesia™: Memories, Hatoful Boyfriend, 私のリアルは充実しすぎている フルボイス版, ATRI -My Dear Moments-, and TAISHO x ALICE episode 1. We matched them by the tags players give Nightshade on Steam (Otome, Female Protagonist, Visual Novel, Adventure, and Romance): closest matches first, and among equally close ones the better-known games.

Amnesia™: Memories
Shared: Otome · Female Protagonist · Visual Novel

Hatoful Boyfriend
Shared: Visual Novel · Female Protagonist · Otome

私のリアルは充実しすぎている フルボイス版
Shared: Otome · Female Protagonist · Visual Novel

ATRI -My Dear Moments-
Shared: Visual Novel · Anime · Romance

TAISHO x ALICE episode 1
Shared: Otome · Visual Novel · Female Protagonist

Hakuoki: Kyoto Winds
Shared: Otome · Female Protagonist · Visual Novel

Senren * Banka
Shared: Visual Novel · Dating Sim · Anime

Blood Code
Shared: Visual Novel · Female Protagonist · Otome

Hakuoki: Edo Blossoms
Shared: Otome · Female Protagonist · Visual Novel

月华辉映之刻
Shared: Female Protagonist · Otome · Visual Novel

Danganronpa V3: Killing Harmony
Shared: Visual Novel · Female Protagonist · Anime

Tricolour Lovestory
Shared: Visual Novel · Dating Sim · Anime

Marco & The Galaxy Dragon
Shared: Visual Novel · Female Protagonist · Adventure

CLANNAD
Shared: Visual Novel · Romance · Anime

My Vow to My Liege
Shared: Female Protagonist · Otome · Visual Novel

LoveChoice
Shared: Romance · Visual Novel · Dating Sim

BUSTAFELLOWS
Shared: Otome · Female Protagonist · Visual Novel

Psychedelica of the Black Butterfly
Shared: Otome · Visual Novel · Female Protagonist

Aokana - Four Rhythms Across the Blue
Shared: Visual Novel · Romance · Anime

eden*
Shared: Visual Novel · Adventure · Romance

Psychedelica of the Ashen Hawk
Shared: Otome · Visual Novel · Adventure

Doki Doki Literature Club Plus!
Shared: Visual Novel · Dating Sim · Anime

7'scarlet
Shared: Otome · Visual Novel · Female Protagonist

STEINS;GATE: My Darling's Embrace
Shared: Visual Novel · Adventure · Female Protagonist