Games like ARCHIVE NINE: Release the Files
Games like ARCHIVE NINE: Release the Files include No, I'm not a Human, Outlast, Poppy Playtime, SOMA, and Outlast 2. We matched them by the tags players give ARCHIVE NINE: Release the Files on Steam (Horror, Atmospheric, Psychological Horror, First-Person, and Conspiracy): closest matches first, and among equally close ones the better-known games.

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

Outlast
Shared: Horror · Atmospheric · First-Person

Poppy Playtime
Shared: Horror · First-Person · Singleplayer

SOMA
Shared: Horror · Atmospheric · Psychological Horror

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

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

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

Firewatch
Shared: Atmospheric · First-Person · Singleplayer

The Casting of Frank Stone™
Shared: Horror · Multiple Endings · Choices Matter

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

Little Nightmares
Shared: Horror · Atmospheric · Singleplayer

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

MiSide
Shared: Psychological Horror · Horror · First-Person

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Atmospheric

Little Nightmares II
Shared: Horror · Atmospheric · Psychological Horror

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

Phasmophobia
Shared: Horror · Psychological Horror · First-Person

Garten of Banban
Shared: Horror · Psychological Horror · First-Person

Visage
Shared: Horror · Psychological Horror · First-Person

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

Tiny Bunny
Shared: Horror · Atmospheric · Psychological Horror

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

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

Five Nights at Freddy's 2
Shared: Horror · Psychological Horror · Singleplayer