Games like Soul Nine
Games like Soul Nine include Slime Rancher, The Stanley Parable, Internet Cafe Simulator 2, The Test, and SnowRunner. We matched them by the tags players give Soul Nine on Steam (Simulation, Choices Matter, Adventure, Psychological, and Emotional): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Exploration · Simulation

The Stanley Parable
Shared: Psychological · Adventure · Walking Simulator

Internet Cafe Simulator 2
Shared: Simulation · Exploration · 3D

The Test
Shared: Simulation · Psychological · Choices Matter

SnowRunner
Shared: Simulation · Adventure · Exploration

The Cabin Factory
Shared: Choices Matter · Adventure · Simulation

Shelter
Shared: Adventure · Simulation · Nature

Millennium Dream
Shared: Adventure · Emotional · Exploration

The Exit 8
Shared: Exploration · Immersive Sim · Walking Simulator

Emily is Away <3
Shared: Simulation · Choices Matter · Emotional

Quarantine Zone: The Last Check
Shared: Simulation · Choices Matter · Singleplayer

Ancestors: The Humankind Odyssey
Shared: Adventure · Simulation · Exploration

Detroit: Become Human
Shared: Choices Matter · Emotional · Adventure

Скуф на рыбалке
Shared: Simulation · Adventure · Immersive Sim

My Child Lebensborn Remastered
Shared: Choices Matter · Simulation · Psychological

Platform 8
Shared: Adventure · Simulation · Walking Simulator

Endling - Extinction is Forever
Shared: Adventure · Emotional · Simulation

The Long Dark
Shared: Exploration · Adventure · Simulation

Love Is All Around
Shared: Choices Matter · Visual Novel · Adventure

Growing Up
Shared: Choices Matter · Simulation · Emotional

恋爱单选题
Shared: Simulation · Exploration · Visual Novel

Ultimate Fishing Simulator
Shared: Simulation · Nature · 3D

Road 96
Shared: Choices Matter · Adventure · First-Person

The Horrorscope
Shared: Simulation · Psychological · Adventure