Games like TheSilentSnowfall
Games like TheSilentSnowfall include Firewatch, What Remains of Edith Finch, POOLS, Layers of Fear (2016), and The Long Dark. We matched them by the tags players give TheSilentSnowfall on Steam (Adventure, Walking Simulator, Exploration, First-Person, and Psychedelic): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · Atmospheric

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

POOLS
Shared: Walking Simulator · Exploration · Psychological Horror

Layers of Fear (2016)
Shared: Walking Simulator · First-Person · Atmospheric

The Long Dark
Shared: Exploration · Adventure · First-Person

The Stanley Parable
Shared: Walking Simulator · First-Person · Adventure

Gone Home
Shared: Walking Simulator · Exploration · First-Person

Scanner Sombre
Shared: Walking Simulator · Exploration · Adventure

Fears to Fathom - Ironbark Lookout
Shared: Adventure · Exploration · Atmospheric

Amnesia: A Machine For Pigs
Shared: Walking Simulator · First-Person · Exploration

NaissanceE
Shared: Exploration · Walking Simulator · Adventure

INFRA
Shared: Exploration · Walking Simulator · Adventure

The Witness
Shared: Exploration · First-Person · Walking Simulator

The Beginner's Guide
Shared: Walking Simulator · First-Person · Adventure

Valley
Shared: Adventure · Exploration · First-Person

Visage
Shared: First-Person · Psychological Horror · Adventure

Fallout 4
Shared: Exploration · Adventure · First-Person

Outer Wilds
Shared: Exploration · Adventure · Atmospheric

Journey
Shared: Adventure · Exploration · Atmospheric

Fears to Fathom - Woodbury Getaway
Shared: Adventure · First-Person · Psychological Horror

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

The Park®
Shared: Walking Simulator · First-Person · Adventure

Outlast
Shared: First-Person · Atmospheric · Psychological Horror

SOMA
Shared: Atmospheric · Psychological Horror · Exploration