Games like Zero-Sum Heart
Games like Zero-Sum Heart include Life is Strange: True Colors, Life is Strange: Double Exposure, Life is Strange Remastered, Detroit: Become Human, and LoveChoice. We matched them by the tags players give Zero-Sum Heart on Steam (Female Protagonist, Story Rich, Choices Matter, Multiple Endings, and Choose Your Own Adventure): closest matches first, and among equally close ones the better-known games.

Life is Strange: True Colors
Shared: Story Rich · Choices Matter · Female Protagonist

Life is Strange: Double Exposure
Shared: Female Protagonist · Choices Matter · Story Rich

Life is Strange Remastered
Shared: Story Rich · Female Protagonist · Choices Matter

Detroit: Become Human
Shared: Story Rich · Choices Matter · Multiple Endings

LoveChoice
Shared: Choices Matter · Story Rich · Romance

Life is Strange: Before the Storm
Shared: Story Rich · Choices Matter · Female Protagonist

The Wolf Among Us
Shared: Story Rich · Multiple Endings · Choices Matter

The Test
Shared: Story Rich · Choose Your Own Adventure · Multiple Endings

Volcano Princess
Shared: Female Protagonist · Choices Matter · Multiple Endings

Life is Strange: Before the Storm Remastered
Shared: Female Protagonist · Choices Matter · Story Rich

The Witcher 3: Wild Hunt — Remastered
Shared: Story Rich · Atmospheric · Choices Matter

Life is Strange: Reunion
Shared: Choices Matter · Female Protagonist · Choose Your Own Adventure

Lost Records: Bloom & Rage
Shared: Female Protagonist · Choices Matter · Story Rich

Oxenfree
Shared: Story Rich · Choices Matter · Female Protagonist

Road to Empress I
Shared: Female Protagonist · Choices Matter · Story Rich

Love Is All Around
Shared: Romance · Multiple Endings · Choices Matter

Sable
Shared: Story Rich · Female Protagonist · Atmospheric

Emily is Away <3
Shared: Choices Matter · Multiple Endings · Story Rich

Growing Up
Shared: Story Rich · Choices Matter · Emotional

Stray Gods: The Roleplaying Musical
Shared: Story Rich · Choices Matter · Female Protagonist

Road 96
Shared: Choices Matter · Story Rich · Multiple Endings

The Walking Dead: The Final Season
Shared: Story Rich · Choices Matter · Female Protagonist

BAD END THEATER
Shared: Multiple Endings · Story Rich · Choices Matter

Road to Empress Ⅱ
Shared: Choices Matter · Female Protagonist · Story Rich