Games like Steam Prison - Fin Route
Games like Steam Prison - Fin Route include Nightshade, Amnesia™: Memories, TAISHO x ALICE episode 1, 私のリアルは充実しすぎている フルボイス版, and Psychedelica of the Ashen Hawk. We matched them by the tags players give Steam Prison - Fin Route on Steam (Adventure, Violent, Otome, Romance, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

Nightshade
Shared: Otome · Adventure · Female Protagonist

Amnesia™: Memories
Shared: Otome · Romance · Female Protagonist

TAISHO x ALICE episode 1
Shared: Adventure · Otome · Female Protagonist

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

Psychedelica of the Ashen Hawk
Shared: Adventure · Otome · Violent

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

WITCH ON THE HOLY NIGHT
Shared: Adventure · Visual Novel · Anime

7'scarlet
Shared: Adventure · Otome · Female Protagonist

Hatoful Boyfriend
Shared: Visual Novel · Female Protagonist · Otome

Hakuoki: Kyoto Winds
Shared: Otome · Romance · Female Protagonist

Hakuoki: Edo Blossoms
Shared: Otome · Adventure · Female Protagonist

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

My Vow to My Liege
Shared: Otome · Romance · Female Protagonist

fault - milestone one
Shared: Visual Novel · Female Protagonist · Anime

Psychedelica of the Black Butterfly
Shared: Adventure · Otome · Romance

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

OZMAFIA!!
Shared: Otome · Romance · Female Protagonist

eden*
Shared: Adventure · Visual Novel · Romance

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

Danganronpa Another Episode: Ultra Despair Girls
Shared: Female Protagonist · Anime · Violent

BUSTAFELLOWS
Shared: Otome · Female Protagonist · Visual Novel

TAISHO x ALICE epilogue
Shared: Adventure · Otome · Female Protagonist

Blood Code
Shared: Romance · Visual Novel · Otome

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