Games like Someone's Here
Games like Someone's Here include No, I'm not a Human, SILENT HILL 2, SOMA, MiSide, and Fears to Fathom - Ironbark Lookout. We matched them by the tags players give Someone's Here on Steam (Horror, Psychological Horror, Multiple Endings, Exploration, and Choices Matter): closest matches first, and among equally close ones the better-known games.

No, I'm not a Human
Shared: Horror · Psychological Horror · Choices Matter

SILENT HILL 2
Shared: Horror · Psychological Horror · Atmospheric

SOMA
Shared: Horror · Psychological Horror · Atmospheric

MiSide
Shared: Psychological Horror · Horror · Story Rich

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

Fears to Fathom - Carson House
Shared: Horror · Psychological Horror · Atmospheric

Lethal Company
Shared: Horror · Psychological Horror · Exploration

Darkwood
Shared: Horror · Psychological Horror · Atmospheric

Five Nights at Freddy's: Security Breach
Shared: Horror · Multiple Endings · Exploration

The Casting of Frank Stone™
Shared: Horror · Multiple Endings · Choices Matter

The Inn-Sanity
Shared: Horror · Psychological Horror · Exploration

The Dark Pictures Anthology: House of Ashes
Shared: Horror · Multiple Endings · Choices Matter

Fears to Fathom - Norwood Hitchhike
Shared: Horror · Psychological Horror · Atmospheric

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

Fears to Fathom - Woodbury Getaway
Shared: Psychological Horror · Horror · Atmospheric

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

Crimson Snow (2023)
Shared: Horror · Exploration · Psychological Horror

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

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

Outlast
Shared: Horror · Psychological Horror · Atmospheric

Firewatch
Shared: Atmospheric · Exploration · Story Rich

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Atmospheric

Escape the Backrooms
Shared: Horror · Psychological Horror · Exploration

The Dark Pictures Anthology: The Devil in Me
Shared: Horror · Multiple Endings · Choices Matter