Games like Star Ring
Games like Star Ring include Volcano Princess, LoveChoice, Hatoful Boyfriend, Lucy -The Eternity She Wished For-, and Doki Doki Literature Club Plus!. We matched them by the tags players give Star Ring on Steam (Female Protagonist, Dating Sim, Story Rich, Multiple Endings, and Romance): closest matches first, and among equally close ones the better-known games.

Volcano Princess
Shared: Female Protagonist · Multiple Endings · Dating Sim

LoveChoice
Shared: Dating Sim · Romance · Story Rich

Hatoful Boyfriend
Shared: Dating Sim · Female Protagonist · Story Rich

Lucy -The Eternity She Wished For-
Shared: Story Rich · Dating Sim · Visual Novel

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

小白兔电商~Bunny e-Shop
Shared: Dating Sim · Story Rich · Visual Novel

ATRI -My Dear Moments-
Shared: Story Rich · Dating Sim · Visual Novel

Love Is All Around
Shared: Dating Sim · Romance · Visual Novel

Magical Princess
Shared: Multiple Endings · Female Protagonist · Dating Sim

Amnesia™: Memories
Shared: Female Protagonist · Dating Sim · Otome

Blood Code
Shared: Female Protagonist · Dating Sim · Romance

月华辉映之刻
Shared: Female Protagonist · Dating Sim · Otome

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

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Multiple Endings · Visual Novel · Story Rich

Mirror 2: Project X
Shared: Female Protagonist · Visual Novel · Multiple Endings

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

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

Tricolour Lovestory
Shared: Dating Sim · Visual Novel · Story Rich

CLANNAD
Shared: Story Rich · Visual Novel · Romance

Otaku's Adventure
Shared: Dating Sim · Multiple Endings · Visual Novel

灾厄黑龙与谎言公主
Shared: Dating Sim · Female Protagonist · Visual Novel

Emily is Away <3
Shared: Dating Sim · Multiple Endings · Simulation

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

Ten Trials of Babel: The Doppelganger Maze
Shared: Female Protagonist · Multiple Endings · Story Rich