Games like Silent: Abandoned
Games like Silent: Abandoned include Mouthwashing, Layers of Fear (2016), What Remains of Edith Finch, SOMA, and Firewatch. We matched them by the tags players give Silent: Abandoned on Steam (Psychological Horror, Walking Simulator, Horror, Psychological, and Cinematic): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Psychological Horror · Horror · Story Rich

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

What Remains of Edith Finch
Shared: Walking Simulator · Story Rich · Exploration

SOMA
Shared: Psychological Horror · Horror · Story Rich

Firewatch
Shared: Walking Simulator · Adventure · Story Rich

Still Wakes the Deep
Shared: Psychological Horror · Horror · Walking Simulator

SILENT HILL 2
Shared: Psychological Horror · Horror · Psychological

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Horror · Psychological Horror

Fears to Fathom - Ironbark Lookout
Shared: Psychological Horror · Horror · Exploration

Summer of '58
Shared: Horror · Psychological Horror · Walking Simulator

MiSide
Shared: Psychological Horror · Horror · Story Rich

ROUTINE
Shared: Psychological Horror · Cinematic · Horror

Blair Witch
Shared: Psychological Horror · Horror · Adventure

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

The Park®
Shared: Psychological Horror · Horror · Walking Simulator

Layers of Fear 2 (2019)
Shared: Psychological Horror · Horror · Walking Simulator

Visage
Shared: Psychological Horror · Horror · Walking Simulator

Little Nightmares II
Shared: Horror · Psychological Horror · Adventure

KARMA: The Dark World
Shared: Psychological Horror · Walking Simulator · Horror

Little Nightmares
Shared: Horror · Adventure · Psychological Horror

SILENT HILL f
Shared: Psychological Horror · Horror · Story Rich

September 7th
Shared: Horror · Walking Simulator · Psychological Horror

DEATH STRANDING DIRECTOR'S CUT
Shared: Walking Simulator · Story Rich · Cinematic

Outlast
Shared: Horror · Psychological Horror · First-Person