Games like Ghost Stories
Games like Ghost Stories include Outlast, The Forest, The Beast Inside, Bendy and the Dark Revival, and Five Nights at Freddy's: Secret of the Mimic. We matched them by the tags players give Ghost Stories on Steam (Adventure, Indie, Action, Horror, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · First-Person · Atmospheric

The Forest
Shared: Horror · Adventure · Action

The Beast Inside
Shared: Adventure · Horror · Action

Bendy and the Dark Revival
Shared: Horror · Action · Adventure

Five Nights at Freddy's: Secret of the Mimic
Shared: Adventure · Horror · Action

The Hat Man: Shadow Ward
Shared: Indie · Adventure · Horror

Firewatch
Shared: Adventure · Atmospheric · First-Person

We Happy Few
Shared: Adventure · Action · Indie

Spooky's Jump Scare Mansion: HD Renovation
Shared: Indie · Adventure · Horror

Lethal Company
Shared: Horror · First-Person · Atmospheric

Among the Sleep - Enhanced Edition
Shared: Indie · Adventure · Horror

Little Nightmares
Shared: Adventure · Horror · Atmospheric

Penumbra Overture
Shared: Adventure · Horror · Indie

METRO Last Light Redux
Shared: Action · Atmospheric · Horror

Poppy Playtime
Shared: Horror · First-Person · Indie

[Chillas Art] The Convenience Store
Shared: Indie · Adventure · Horror

METRO 2033 Redux
Shared: Atmospheric · Horror · Action

Despair
Shared: Indie · Action · Horror

PEAK
Shared: Adventure · First-Person · Atmospheric

Valley
Shared: Adventure · Indie · First-Person

Slender: The Arrival
Shared: Horror · Indie · First-Person

IMSCARED
Shared: Indie · Horror · Adventure

Thief
Shared: Action · Adventure · First-Person

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Atmospheric