Games like Heileen 3: New Horizons
Games like Heileen 3: New Horizons include Sweet Home, Tricolour Lovestory, Volcano Princess, Hatoful Boyfriend, and My Vow to My Liege. We matched them by the tags players give Heileen 3: New Horizons on Steam (Visual Novel, Simulation, Pirates, LGBTQ+, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

Sweet Home
Shared: Visual Novel · LGBTQ+ · Female Protagonist

Tricolour Lovestory
Shared: Visual Novel · Simulation · Dating Sim

Volcano Princess
Shared: Female Protagonist · Simulation · Visual Novel

Hatoful Boyfriend
Shared: Visual Novel · Dating Sim · Female Protagonist

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

1 to 1 humanoid edible toys
Shared: Visual Novel · Female Protagonist · LGBTQ+

Date Everything!
Shared: LGBTQ+ · Simulation · Dating Sim

Love Curse: Find Your Soulmate
Shared: Visual Novel · LGBTQ+ · Female Protagonist

Dream Daddy: A Dad Dating Simulator
Shared: LGBTQ+ · Visual Novel · Simulation

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

Our Life: Beginnings & Always
Shared: Visual Novel · LGBTQ+ · Dating Sim

Class of '09: The Re-Up
Shared: Visual Novel · Female Protagonist · Simulation

Amnesia™: Memories
Shared: Visual Novel · Female Protagonist · Dating Sim

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

Emily is Away <3
Shared: Simulation · Dating Sim · Visual Novel

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

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

Far Away
Shared: Visual Novel · Singleplayer · Female Protagonist

Mirror 2: Project X
Shared: Visual Novel · Female Protagonist · Anime

VA-11 Hall-A: Cyberpunk Bartender Action
Shared: Visual Novel · Female Protagonist · LGBTQ+

Gaokao.Love.100Days
Shared: Visual Novel · Dating Sim · Simulation

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

Monster Prom
Shared: LGBTQ+ · Visual Novel · Dating Sim

千面 Melancholy Love
Shared: Visual Novel · LGBTQ+ · Simulation