Games like Hollow Cocoon
Games like Hollow Cocoon include Outlast, SOMA, Poppy Playtime, Little Nightmares, and Five Nights at Freddy's: Security Breach. We matched them by the tags players give Hollow Cocoon on Steam (Horror, Psychological Horror, Adventure, Survival Horror, and Dark): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Survival Horror · Psychological Horror

SOMA
Shared: Horror · Psychological Horror · Dark

Poppy Playtime
Shared: Horror · Survival Horror · Psychological Horror

Little Nightmares
Shared: Horror · Adventure · Dark

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

Visage
Shared: Horror · Psychological Horror · Survival Horror

Outlast 2
Shared: Horror · Psychological Horror · Survival Horror

Little Nightmares II
Shared: Horror · Adventure · Psychological Horror

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Survival Horror

Darkwood
Shared: Horror · Adventure · Psychological Horror

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

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

The Outlast Trials
Shared: Horror · Psychological Horror · Survival Horror

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

Penumbra Overture
Shared: Horror · Adventure · Survival Horror

SILENT HILL 2
Shared: Horror · Psychological Horror · Survival Horror

Lethal Company
Shared: Horror · Survival Horror · Psychological Horror

Blair Witch
Shared: Horror · Psychological Horror · Adventure

Slender: The Arrival
Shared: Horror · Survival Horror · Psychological Horror

Escape the Backrooms
Shared: Horror · Psychological Horror · Survival Horror

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

Inside the Backrooms
Shared: Horror · Survival Horror · Psychological Horror

The Beast Inside
Shared: Horror · Adventure · Survival Horror

Penumbra: Black Plague Gold Edition
Shared: Horror · Adventure · Psychological Horror