Games like Still Life Inside
Games like Still Life Inside include Tiny Bunny, That's not my Neighbor, Five Nights at Freddy's: Into the Pit, Firework, and The Wolf Among Us. We matched them by the tags players give Still Life Inside on Steam (Adventure, Visual Novel, 2D Platformer, 2D, and Horror): closest matches first, and among equally close ones the better-known games.

Tiny Bunny
Shared: Visual Novel · Horror · Choices Matter

That's not my Neighbor
Shared: Adventure · Horror · Choices Matter

Five Nights at Freddy's: Into the Pit
Shared: Adventure · Horror · 2D

Firework
Shared: Horror · 2D · Indie

The Wolf Among Us
Shared: Adventure · Visual Novel · Choices Matter

Undertale
Shared: Choices Matter · Multiple Endings · 2D

Far Away
Shared: Visual Novel · Choices Matter · Singleplayer

Tales of the Black Forest
Shared: Adventure · Horror · Visual Novel

Slay the Princess — The Pristine Cut
Shared: Visual Novel · Choices Matter · Horror

Soul Gambler
Shared: Adventure · Visual Novel · Choices Matter

Tiny Bunny: Prologue
Shared: Visual Novel · Adventure · Horror

Reventure
Shared: Adventure · 2D · Indie

INSIDE
Shared: Horror · Adventure · Indie

PARANORMASIGHT: The Seven Mysteries of Honjo
Shared: Adventure · Visual Novel · Horror

No, I'm not a Human
Shared: Horror · Choices Matter · Indie

Detroit: Become Human
Shared: Choices Matter · Multiple Endings · Adventure

The Test
Shared: Multiple Endings · Visual Novel · Choices Matter

SANABI
Shared: Adventure · 2D Platformer · 2D

Martial Law
Shared: Adventure · Choices Matter · Multiple Endings

The Coma 2: Vicious Sisters
Shared: Adventure · Horror · Indie

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · Adventure

Return to Shironagasu Island
Shared: Adventure · Visual Novel · Horror

Urban Myth Dissolution Center
Shared: Visual Novel · Adventure · 2D

Little Misfortune
Shared: Adventure · Indie · Choices Matter