Games like SHIATH
Games like SHIATH include Firewatch, What Remains of Edith Finch, MiSide, Outlast, and Poppy Playtime. We matched them by the tags players give SHIATH on Steam (Psychological Horror, Adventure, Singleplayer, Interactive Fiction, and Mystery): closest matches first, and among equally close ones the better-known games.
Firewatch
Shared: Adventure · Atmospheric · Mystery
What Remains of Edith Finch
Shared: Mystery · Adventure · Atmospheric
MiSide
Shared: Psychological Horror · Singleplayer · First-Person
Outlast
Shared: Psychological Horror · Singleplayer · First-Person
Poppy Playtime
Shared: Singleplayer · Psychological Horror · First-Person
Outer Wilds
Shared: Adventure · Mystery · Singleplayer
Sally Face - Episode One
Shared: Psychological Horror · Adventure · Mystery
Layers of Fear (2016)
Shared: Psychological Horror · Singleplayer · Atmospheric
Mouthwashing
Shared: Psychological Horror · Atmospheric · Surreal
Amnesia: A Machine For Pigs
Shared: Psychological Horror · Atmospheric · Mystery
Raging Loop
Shared: Adventure · Psychological Horror · Mystery
Outlast 2
Shared: Psychological Horror · Singleplayer · First-Person
BioShock Infinite
Shared: Singleplayer · Adventure · First-Person
Metro Exodus
Shared: Singleplayer · FPS · Atmospheric
Resident Evil 7 Biohazard
Shared: Singleplayer · Psychological Horror · First-Person
Subliminal
Shared: Psychological Horror · Singleplayer · Mystery
The Beginner's Guide
Shared: Singleplayer · Atmospheric · Adventure
Garten of Banban
Shared: Singleplayer · Psychological Horror · First-Person
SOMA
Shared: Psychological Horror · Atmospheric · Singleplayer
No, I'm not a Human
Shared: Psychological Horror · Singleplayer · Atmospheric
Fran Bow
Shared: Psychological Horror · Adventure · Singleplayer
The Room Three
Shared: Adventure · Mystery · Singleplayer
Little Nightmares II
Shared: Adventure · Singleplayer · Psychological Horror
Fallout 4
Shared: Singleplayer · Adventure · Atmospheric