Games like The Reflection
Games like The Reflection include Phasmophobia, Lethal Company, Escape the Backrooms, Backrooms: Escape Together, and Dead by Daylight. We matched them by the tags players give The Reflection on Steam (Online Co-Op, Psychological Horror, Early Access, Horror, and Investigation): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Online Co-Op · Horror · Psychological Horror

Lethal Company
Shared: Online Co-Op · Horror · First-Person

Escape the Backrooms
Shared: Online Co-Op · Horror · Psychological Horror

Backrooms: Escape Together
Shared: Online Co-Op · Psychological Horror · Horror

Dead by Daylight
Shared: Horror · Online Co-Op · Survival Horror

Pacify
Shared: Online Co-Op · Horror · Psychological Horror

DEVOUR
Shared: Online Co-Op · Horror · Psychological Horror

Nuclear Nightmare
Shared: Online Co-Op · Horror · Psychological Horror

Inside the Backrooms
Shared: Horror · Psychological Horror · Online Co-Op

Content Warning
Shared: Online Co-Op · Horror · Psychological Horror

Outlast
Shared: Horror · Psychological Horror · First-Person

BIGFOOT
Shared: Online Co-Op · Horror · Survival Horror

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

Subnautica 2
Shared: Horror · Co-op · First-Person

R.E.P.O.
Shared: Online Co-Op · Horror · Co-op

PANICORE
Shared: Online Co-Op · Horror · Psychological Horror

Demonologist
Shared: Online Co-Op · Horror · Psychological Horror

Species: Unknown
Shared: Online Co-Op · Horror · First-Person

Zort
Shared: Online Co-Op · Horror · Psychological Horror

PEAK
Shared: Online Co-Op · Co-op · First-Person

In Silence
Shared: Online Co-Op · Horror · Psychological Horror

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

Ghost Exile
Shared: Online Co-Op · Horror · Psychological Horror

Left 4 Dead 2
Shared: Online Co-Op · Co-op · Horror