Games like Psycho
Games like Psycho include Escape the Backrooms, The Outlast Trials, Outlast, Sons Of The Forest, and Dead by Daylight. We matched them by the tags players give Psycho on Steam (Horror, Action, Adventure, Psychological Horror, and Survival Horror): closest matches first, and among equally close ones the better-known games.

Escape the Backrooms
Shared: Horror · Co-op · Psychological Horror

The Outlast Trials
Shared: Horror · Co-op · Psychological Horror

Outlast
Shared: Horror · Survival Horror · Psychological Horror

Sons Of The Forest
Shared: Co-op · Horror · Survival

Dead by Daylight
Shared: Horror · Co-op · Survival Horror

Subnautica 2
Shared: Horror · Co-op · Survival

The Forest
Shared: Horror · Survival · Adventure

The Beast Inside
Shared: Horror · Adventure · Action

Left 4 Dead 2
Shared: Co-op · Action · Horror

Lethal Company
Shared: Horror · Co-op · Survival Horror

Backrooms: Escape Together
Shared: Horror · Psychological Horror · Co-op

DEVOUR
Shared: Horror · Co-op · Survival Horror

Outlast 2
Shared: Horror · Psychological Horror · Survival Horror

Dying Light
Shared: Horror · Survival Horror · Action

Dark Deception
Shared: Horror · Psychological Horror · Multiplayer

Poppy Playtime
Shared: Horror · Survival Horror · Psychological Horror

Slender: The Arrival
Shared: Horror · Survival Horror · Psychological Horror

Resident Evil Revelations 2
Shared: Horror · Action · Co-op

Pacify
Shared: Horror · Co-op · Psychological Horror

Inside the Backrooms
Shared: Horror · Co-op · Survival Horror

Resident Evil 7 Biohazard
Shared: Horror · Survival Horror · Action

Ready or Not
Shared: Horror · Co-op · Multiplayer

In Silence
Shared: Horror · Co-op · Survival Horror

Phasmophobia
Shared: Horror · Co-op · Psychological Horror