Games like The Duchess Curse
Games like The Duchess Curse include Poppy Playtime, Escape the Backrooms, Little Nightmares II, Amnesia: Rebirth, and Outlast. We matched them by the tags players give The Duchess Curse on Steam (Adventure, Horror, Psychological Horror, First-Person, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

Escape the Backrooms
Shared: Horror · Psychological Horror · First-Person

Little Nightmares II
Shared: Adventure · Horror · Singleplayer

Amnesia: Rebirth
Shared: First-Person · Action-Adventure · Horror

Outlast
Shared: Horror · First-Person · Psychological Horror

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

Hello Neighbor 2
Shared: Adventure · Horror · First-Person

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Singleplayer

SOMA
Shared: Horror · Psychological Horror · First-Person

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

MiSide
Shared: Psychological Horror · Horror · First-Person

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

SILENT HILL: Townfall
Shared: Adventure · Horror · Psychological Horror

Inside the Backrooms
Shared: Horror · Psychological Horror · Adventure

Atomic Heart
Shared: Adventure · Horror · Singleplayer

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · First-Person

Indiana Jones and the Great Circle
Shared: First-Person · Action-Adventure · Adventure

Scanner Sombre
Shared: Horror · Adventure · Exploration

The Forest
Shared: Horror · Adventure · First-Person

The Bridge Curse Road to Salvation
Shared: Horror · First-Person · Psychological Horror

IMSCARED
Shared: Horror · Psychological Horror · Adventure

The Beast Inside
Shared: Adventure · Horror · First-Person

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

The Exit 8
Shared: Horror · Exploration · Psychological Horror