Games like Hollow Life
Games like Hollow Life include No, I'm not a Human, Layers of Fear (2016), Outlast, Poppy Playtime, and Mouthwashing. We matched them by the tags players give Hollow Life on Steam (Psychological Horror, Casual, Walking Simulator, First-Person, and Singleplayer): closest matches first, and among equally close ones the better-known games.

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

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

Outlast
Shared: First-Person · Psychological Horror · Horror

Poppy Playtime
Shared: Singleplayer · First-Person · Psychological Horror

Mouthwashing
Shared: Psychological Horror · Horror · Walking Simulator

The Death | Thần Trùng
Shared: Psychological Horror · Casual · Horror

Fears to Fathom - Woodbury Getaway
Shared: Psychological Horror · Casual · First-Person

The Stanley Parable
Shared: Walking Simulator · First-Person · Dynamic Narration

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

Visage
Shared: Psychological Horror · First-Person · Horror

Getting Over It with Bennett Foddy
Shared: Psychological Horror · Singleplayer · Casual

KARMA: The Dark World
Shared: Psychological Horror · Walking Simulator · First-Person

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

Fears to Fathom® - Scratch Creek
Shared: Psychological Horror · Casual · Horror

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

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

POOLS
Shared: Psychological Horror · Walking Simulator · First-Person

DISTRAINT: Deluxe Edition
Shared: Psychological Horror · Pixel Graphics · Horror

KinitoPET
Shared: Psychological Horror · Horror · Pixel Graphics

Buckshot Roulette
Shared: First-Person · Singleplayer · Horror

MiSide
Shared: Psychological Horror · First-Person · Singleplayer

DISTRAINT 2
Shared: Psychological Horror · Singleplayer · Horror

Ready or Not
Shared: Singleplayer · Psychological Horror · First-Person

SOMA
Shared: Psychological Horror · Horror · First-Person