Games like Fingerbones
Games like Fingerbones include Poppy Playtime, Layers of Fear (2016), Outlast, Ultimate Custom Night, and SOMA. We matched them by the tags players give Fingerbones on Steam (Free to Play, Horror, Psychological Horror, Indie, and Adventure): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Free to Play · Singleplayer

Layers of Fear (2016)
Shared: Horror · Psychological Horror · First-Person

Outlast
Shared: Horror · Psychological Horror · First-Person

Ultimate Custom Night
Shared: Free to Play · Horror · Singleplayer

SOMA
Shared: Horror · Psychological Horror · Dark

What Remains of Edith Finch
Shared: First-Person · Adventure · Walking Simulator

Little Nightmares
Shared: Horror · Adventure · Indie

Blair Witch
Shared: Horror · Psychological Horror · Adventure

Firewatch
Shared: Adventure · First-Person · Walking Simulator

Little Nightmares II
Shared: Horror · Adventure · Psychological Horror

Dark Deception
Shared: Free to Play · Horror · Psychological Horror

Visage
Shared: Horror · Psychological Horror · Dark

Samsara Room
Shared: Free to Play · Indie · Adventure

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

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

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

IMSCARED
Shared: Horror · Psychological Horror · Indie

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

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

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

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

Amnesia: A Machine For Pigs
Shared: Horror · Psychological Horror · First-Person

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · First-Person

DISTRAINT: Deluxe Edition
Shared: Horror · Psychological Horror · Indie