Games like Silent Still
Games like Silent Still include Summer of '58, Mouthwashing, MiSide, SOMA, and No, I'm not a Human. We matched them by the tags players give Silent Still on Steam (Simulation, Horror, Walking Simulator, First-Person, and Story Rich): closest matches first, and among equally close ones the better-known games.

Summer of '58
Shared: Horror · Walking Simulator · First-Person

Mouthwashing
Shared: Horror · Psychological Horror · Story Rich

MiSide
Shared: Horror · Psychological Horror · Story Rich

SOMA
Shared: Horror · Psychological Horror · Story Rich

No, I'm not a Human
Shared: Horror · Psychological Horror · Story Rich

Layers of Fear (2016)
Shared: Horror · Walking Simulator · Psychological Horror

Phasmophobia
Shared: Horror · Psychological Horror · First-Person

What Remains of Edith Finch
Shared: Walking Simulator · Story Rich · First-Person

Amnesia: A Machine For Pigs
Shared: Horror · Walking Simulator · Story Rich

Dollmare
Shared: Simulation · Horror · First-Person

Still Wakes the Deep
Shared: Horror · Psychological Horror · First-Person

DON'T SCREAM
Shared: Horror · Psychological Horror · First-Person

Firewatch
Shared: Walking Simulator · Story Rich · First-Person

September 7th
Shared: Horror · Walking Simulator · First-Person

Visage
Shared: Horror · Psychological Horror · First-Person

Outlast
Shared: Horror · First-Person · Psychological Horror

The Cabin Factory
Shared: Horror · Walking Simulator · Psychological Horror

The Mortuary Assistant
Shared: Horror · Simulation · Atmospheric

Outlast 2
Shared: Horror · First-Person · Psychological Horror

Dagon: by H. P. Lovecraft
Shared: Horror · First-Person · Story Rich

Silent Still 2
Shared: Simulation · Walking Simulator · First-Person

Garten of Banban
Shared: Horror · First-Person · Psychological Horror

Welcome to Kowloon
Shared: Horror · Walking Simulator · Psychological Horror

KARMA: The Dark World
Shared: Walking Simulator · Horror · First-Person