Games like The Assessment
Games like The Assessment include SILENT HILL 2, What Remains of Edith Finch, Firewatch, Lethal Company, and SOMA. We matched them by the tags players give The Assessment on Steam (Psychological, Horror, Emotional, Exploration, and Third Person): closest matches first, and among equally close ones the better-known games.

SILENT HILL 2
Shared: Horror · Psychological · Psychological Horror

What Remains of Edith Finch
Shared: Exploration · First-Person · Atmospheric

Firewatch
Shared: Atmospheric · First-Person · Exploration

Lethal Company
Shared: Horror · First-Person · Exploration

SOMA
Shared: Horror · Psychological Horror · Exploration

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

Phasmophobia
Shared: Horror · Psychological Horror · First-Person

The Park®
Shared: Horror · Psychological Horror · First-Person

Mouthwashing
Shared: Horror · Psychological · Psychological Horror

Poppy Playtime
Shared: Horror · First-Person · Psychological Horror

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

Layers of Fear (2016)
Shared: Horror · Psychological Horror · First-Person

Outlast
Shared: Horror · First-Person · Psychological Horror

Outer Wilds
Shared: Exploration · Mystery · Atmospheric

SILENT HILL: Townfall
Shared: Horror · First-Person · Exploration

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

Millennium Dream
Shared: Emotional · Exploration · Psychological Horror

The Exit 8
Shared: Exploration · Horror · Psychological Horror

SILENT HILL f
Shared: Horror · Psychological Horror · Psychological

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

Escape the Backrooms
Shared: Horror · Psychological Horror · First-Person

Hellblade: Senua's Sacrifice
Shared: Psychological · Atmospheric · Horror

Scanner Sombre
Shared: Horror · Exploration · First-Person

Inside the Backrooms
Shared: Horror · Psychological Horror · Exploration