Games like Kozyrev Horrors
Games like Kozyrev Horrors include Outlast, Lethal Company, Phasmophobia, SOMA, and Poppy Playtime. We matched them by the tags players give Kozyrev Horrors on Steam (Horror, Psychological Horror, 1990's, Immersive Sim, and Simulation): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Psychological Horror · First-Person

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

Phasmophobia
Shared: Horror · Psychological Horror · First-Person

SOMA
Shared: Horror · Psychological Horror · Sci-fi

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

MiSide
Shared: Psychological Horror · Horror · First-Person

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

Prey
Shared: Immersive Sim · Horror · Sci-fi

Alien: Isolation
Shared: Horror · Sci-fi · First-Person

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

The Cabin Factory
Shared: Horror · Psychological Horror · Immersive Sim

Pacify
Shared: Horror · Psychological Horror · First-Person

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

ROUTINE
Shared: Psychological Horror · Horror · Sci-fi

Five Nights at Freddy's
Shared: Horror · Psychological Horror · First-Person

The Outlast Trials
Shared: Horror · Psychological Horror · First-Person

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

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

Summer of '58
Shared: Horror · Psychological Horror · Thriller

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

Iron Lung
Shared: Horror · Psychological Horror · Atmospheric

Visage
Shared: Horror · Psychological Horror · First-Person

Kiosk
Shared: Horror · Psychological Horror · Immersive Sim

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · First-Person