Games like Breath of Ghosts
Games like Breath of Ghosts include Phasmophobia, Summer of '58, The Complex: Expedition, MiSide, and No, I'm not a Human. We matched them by the tags players give Breath of Ghosts on Steam (Cinematic, Psychological Horror, Horror, Mystery, and Realistic): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Horror · Psychological Horror · Supernatural

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

The Complex: Expedition
Shared: Horror · Psychological Horror · Realistic

MiSide
Shared: Psychological Horror · Horror · Story Rich

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

Sally Face - Episode One
Shared: Psychological Horror · Horror · Mystery

SOMA
Shared: Psychological Horror · Horror · Story Rich

Mouthwashing
Shared: Psychological Horror · Horror · Story Rich

Pacify
Shared: Horror · Psychological Horror · Supernatural

Poppy Playtime
Shared: Horror · Psychological Horror · Mystery

SILENT HILL 2
Shared: Psychological Horror · Horror · Story Rich

Subliminal
Shared: Psychological Horror · Realistic · Mystery

Resident Evil Requiem
Shared: Horror · Cinematic · First-Person

Escape the Backrooms
Shared: Horror · Psychological Horror · First-Person

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

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

September 7th
Shared: Horror · Psychological Horror · 3D

The Mortuary Assistant
Shared: Horror · Mystery · Supernatural

Amnesia: A Machine For Pigs
Shared: Horror · Psychological Horror · Mystery

Buckshot Roulette
Shared: Horror · First-Person · Psychological Horror

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

Martha Is Dead
Shared: Psychological Horror · Horror · Cinematic

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

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