Games like Another_World
Games like Another_World include SOMA, Lethal Company, OMORI, Layers of Fear (2016), and What Remains of Edith Finch. We matched them by the tags players give Another_World on Steam (Indie, Psychological Horror, Horror, First-Person, and Atmospheric): closest matches first, and among equally close ones the better-known games.

SOMA
Shared: Psychological Horror · Horror · Atmospheric

Lethal Company
Shared: Horror · First-Person · Psychological Horror

OMORI
Shared: Psychological Horror · Indie · Story Rich

Layers of Fear (2016)
Shared: Psychological Horror · Horror · Atmospheric

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

MiSide
Shared: Psychological Horror · Horror · First-Person

Mouthwashing
Shared: Psychological Horror · Horror · Indie

Firewatch
Shared: Atmospheric · First-Person · Story Rich

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

Outer Wilds
Shared: Exploration · Atmospheric · Story Rich

Detention
Shared: Indie · Horror · Psychological Horror

Outlast
Shared: Horror · First-Person · Psychological Horror

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

SILENT HILL 2
Shared: Psychological Horror · Horror · Atmospheric

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

In Sound Mind
Shared: Psychological Horror · Horror · Indie

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

Sally Face - Episode One
Shared: Psychological Horror · Indie · Horror

Backrooms: Escape Together
Shared: Horror · Psychological Horror · Atmospheric

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Atmospheric

Five Nights at Freddy's
Shared: Horror · Psychological Horror · Indie

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

Little Nightmares
Shared: Horror · Atmospheric · Indie

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