Games like HOLES
Games like HOLES include Poppy Playtime, Outlast, Mouthwashing, Outlast 2, and Garten of Banban. We matched them by the tags players give HOLES on Steam (Horror, 1990's, Retro, Surreal, and Thriller): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Survival Horror · Mystery

Outlast
Shared: Horror · Atmospheric · Survival Horror

Mouthwashing
Shared: Horror · Retro · Atmospheric

Outlast 2
Shared: Horror · Survival Horror · Atmospheric

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

No one lives under the lighthouse Director's cut
Shared: Horror · Atmospheric · Retro

SOMA
Shared: Horror · Atmospheric · Survival Horror

The Mortuary Assistant
Shared: Horror · Atmospheric · Surreal

Little Nightmares II
Shared: Horror · Adventure · Atmospheric

Choo-Choo Charles
Shared: Horror · Survival Horror · First-Person

Resident Evil 7 Biohazard
Shared: Horror · Survival Horror · Atmospheric

Little Nightmares
Shared: Horror · Atmospheric · Adventure

Visage
Shared: Horror · Survival Horror · Atmospheric

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

Shift At Midnight
Shared: Horror · Retro · Survival Horror

The Forest
Shared: Horror · Adventure · Survival Horror

Darkwood
Shared: Horror · Adventure · Survival Horror

Garten of Banban 2
Shared: Horror · Atmospheric · First-Person

MiSide
Shared: Horror · Atmospheric · Thriller

Bad Parenting 1: Mr. Red Face
Shared: Horror · 1990's · Adventure

Inside the Backrooms
Shared: Horror · Survival Horror · Adventure

Firewatch
Shared: Atmospheric · Adventure · Mystery

Alan Wake
Shared: Horror · Thriller · Adventure

No, I'm not a Human
Shared: Horror · Atmospheric · Dark