Games like Star Girls
Games like Star Girls include LoveChoice, Love Is All Around, Senren * Banka, Volcano Princess, and Lucy -The Eternity She Wished For-. We matched them by the tags players give Star Girls on Steam (Bullet Hell, Dating Sim, Multiple Endings, Space, and Sci-fi): closest matches first, and among equally close ones the better-known games.

LoveChoice
Shared: Dating Sim · Romance · Multiple Endings

Love Is All Around
Shared: Dating Sim · Multiple Endings · Romance

Senren * Banka
Shared: Dating Sim · Visual Novel · Multiple Endings

Volcano Princess
Shared: Multiple Endings · Dating Sim · RPG

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

ATRI -My Dear Moments-
Shared: Dating Sim · Visual Novel · Multiple Endings

Knowledge, or know Lady
Shared: Dating Sim · Multiple Endings · Romance

Undertale
Shared: Multiple Endings · Choices Matter · Bullet Hell

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

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

The Three Kingdoms: Rebirth
Shared: Dating Sim · Multiple Endings · Romance

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

Gaokao.Love.100Days
Shared: Dating Sim · Multiple Endings · Romance

Mass Effect™ Legendary Edition
Shared: Sci-fi · Space · RPG

他人世界末 On-looker
Shared: Dating Sim · Multiple Endings · Visual Novel

Aliya: Timelink
Shared: Multiple Endings · Space · Sci-fi

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

STEINS;GATE
Shared: Sci-fi · Multiple Endings · Visual Novel

CLANNAD
Shared: Multiple Endings · Dating Sim · Visual Novel

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

Emily is Away Too
Shared: Dating Sim · Multiple Endings · Choices Matter

Vampire Survivors
Shared: Bullet Hell · 2D · Arcade

Legend of Mortal
Shared: Multiple Endings · Dating Sim · RPG

Magical Princess
Shared: Multiple Endings · Dating Sim · RPG