Games like OPEN DOOR
Games like OPEN DOOR include Poppy Playtime, SOMA, Outlast, Outlast 2, and Amnesia: The Dark Descent. We matched them by the tags players give OPEN DOOR on Steam (Thriller, Psychological Horror, Atmospheric, First-Person, and Puzzle): closest matches first, and among equally close ones the better-known games.

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

SOMA
Shared: Psychological Horror · Atmospheric · Dark

Outlast
Shared: First-Person · Atmospheric · Psychological Horror

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

Amnesia: The Dark Descent
Shared: Psychological Horror · Atmospheric · Puzzle

Resident Evil 7 Biohazard
Shared: First-Person · Atmospheric · Psychological Horror

Mouthwashing
Shared: Psychological Horror · Atmospheric · Thriller

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

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

MiSide
Shared: Psychological Horror · First-Person · Atmospheric

ROUTINE
Shared: Psychological Horror · Atmospheric · Singleplayer

Scorn
Shared: Atmospheric · Puzzle · First-Person

Resident Evil Village
Shared: First-Person · Singleplayer · Action

Bendy and the Ink Machine
Shared: First-Person · Puzzle · Singleplayer

MADiSON
Shared: Psychological Horror · First-Person · Dark

Little Nightmares II
Shared: Puzzle · Atmospheric · Psychological Horror

Buckshot Roulette
Shared: Dark · First-Person · Psychological Horror

The Room Two
Shared: Puzzle · Atmospheric · Hidden Object

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

Superliminal
Shared: First-Person · Puzzle · Thriller

Garten of Banban 2
Shared: First-Person · Psychological Horror · Puzzle

Visage
Shared: Psychological Horror · First-Person · Dark

The Room
Shared: Puzzle · Atmospheric · Hidden Object

Lethal Company
Shared: First-Person · Psychological Horror · Exploration