Games like Conrad Stevenson's Paranormal P.I.
Games like Conrad Stevenson's Paranormal P.I. include Phasmophobia, Pacify, Ghost Exorcism INC., Lethal Company, and Demonologist. We matched them by the tags players give Conrad Stevenson's Paranormal P.I. on Steam (Psychological Horror, Supernatural, Horror, Investigation, and Exploration): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Horror · Psychological Horror · Supernatural

Pacify
Shared: Horror · Psychological Horror · Supernatural

Ghost Exorcism INC.
Shared: Horror · Supernatural · Psychological Horror

Lethal Company
Shared: Horror · Psychological Horror · Exploration

Demonologist
Shared: Horror · Psychological Horror · Investigation

iBLiS
Shared: Psychological Horror · Horror · Supernatural

The Mortuary Assistant
Shared: Supernatural · Horror · Demons

The Painscreek Killings
Shared: Investigation · Exploration · Horror

Supernormal
Shared: Psychological Horror · Horror · Supernatural

The Exit 8
Shared: Exploration · Horror · Psychological Horror

The Outlast Trials
Shared: Horror · Psychological Horror · PvE

Dread Flats
Shared: Psychological Horror · Horror · Supernatural

Escape the Backrooms
Shared: Horror · Psychological Horror · Exploration

DON'T SCREAM
Shared: Psychological Horror · Horror · Exploration

Backrooms: Escape Together
Shared: Horror · Psychological Horror · Exploration

Firework
Shared: Horror · Psychological Horror · Thriller

SOMA
Shared: Psychological Horror · Horror · Exploration

Fears to Fathom - Ironbark Lookout
Shared: Psychological Horror · Horror · Exploration

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

Subliminal
Shared: Psychological Horror · Horror · Thriller

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

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

[Chillas Art] Shinkansen 0 0
Shared: Psychological Horror · Horror · Supernatural

The Escape: Together
Shared: Horror · Exploration · Immersive Sim