Games like The Forgotten Apartment
Games like The Forgotten Apartment include Mouthwashing, Outlast, SOMA, No, I'm not a Human, and Still Wakes the Deep. We matched them by the tags players give The Forgotten Apartment on Steam (Indie, Gore, Horror, Psychological Horror, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Horror · Psychological Horror · Indie

Outlast
Shared: Horror · Gore · Psychological Horror

SOMA
Shared: Horror · Psychological Horror · Atmospheric

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

Still Wakes the Deep
Shared: Horror · Gore · Psychological Horror

Outlast 2
Shared: Horror · Psychological Horror · Gore

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

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

MiSide
Shared: Psychological Horror · Horror · Story Rich

What Remains of Edith Finch
Shared: Atmospheric · Walking Simulator · Indie

Resident Evil 7 Biohazard
Shared: Horror · Gore · Atmospheric

Fran Bow
Shared: Psychological Horror · Horror · Indie

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

Scorn
Shared: Gore · Horror · Atmospheric

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

Tiny Bunny
Shared: Horror · Atmospheric · Psychological Horror

Blair Witch
Shared: Horror · Indie · Psychological Horror

Little Nightmares
Shared: Horror · Atmospheric · Indie

Firewatch
Shared: Atmospheric · Walking Simulator · Indie

Poppy Playtime
Shared: Horror · Psychological Horror · Indie

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

Resident Evil Village
Shared: Horror · Gore · First-Person

Lobotomy Corporation | Monster Management Simulation
Shared: Psychological Horror · Horror · Gore

Psalm 5:9-13
Shared: Indie · Horror · Psychological Horror