Games like Perception
Games like Perception include What Remains of Edith Finch, Firewatch, Little Nightmares, Layers of Fear (2016), and Outlast. We matched them by the tags players give Perception on Steam (Indie, Horror, Adventure, Female Protagonist, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

What Remains of Edith Finch
Shared: Walking Simulator · Atmospheric · Adventure

Firewatch
Shared: Adventure · Walking Simulator · Atmospheric

Little Nightmares
Shared: Horror · Adventure · Atmospheric

Layers of Fear (2016)
Shared: Horror · Walking Simulator · Indie

Outlast
Shared: Horror · First-Person · Atmospheric

SOMA
Shared: Horror · Atmospheric · Psychological Horror

Little Nightmares II
Shared: Horror · Adventure · Singleplayer

Amnesia: A Machine For Pigs
Shared: Horror · Walking Simulator · Atmospheric

Hellblade: Senua's Sacrifice
Shared: Female Protagonist · Atmospheric · Adventure

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

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

MiSide
Shared: Horror · Psychological Horror · Story Rich

Mouthwashing
Shared: Horror · Indie · Atmospheric

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

Visage
Shared: Horror · Indie · Adventure

Blair Witch
Shared: Horror · Adventure · Indie

Still Wakes the Deep
Shared: Horror · Walking Simulator · Psychological Horror

The Medium
Shared: Horror · Adventure · Female Protagonist

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · First-Person

A Plague Tale: Innocence
Shared: Adventure · Female Protagonist · Story Rich

The Beast Inside
Shared: Horror · Adventure · Indie

Outlast 2
Shared: Horror · Singleplayer · First-Person

Penumbra Overture
Shared: Horror · Adventure · Indie

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