Games like DarkHouse
Games like DarkHouse include Poppy Playtime, Little Nightmares II, SOMA, Little Nightmares, and Outlast. We matched them by the tags players give DarkHouse on Steam (Horror, Puzzle, Dark, Physics, and Old School): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Puzzle · Dark

Little Nightmares II
Shared: Horror · Puzzle · Dark

SOMA
Shared: Horror · Psychological Horror · Dark

Little Nightmares
Shared: Horror · Dark · Puzzle

Outlast
Shared: Horror · Psychological Horror · Atmospheric

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

Sally Face - Episode One
Shared: Horror · Dark · Puzzle

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

Fran Bow
Shared: Puzzle · Horror · Psychological Horror

What Remains of Edith Finch
Shared: Atmospheric · Exploration · Singleplayer

Outlast 2
Shared: Horror · Psychological Horror · Dark

The Room Two
Shared: Puzzle · Horror · Atmospheric

Firework
Shared: Horror · Puzzle · Psychological Horror

ROUTINE
Shared: Dark · Psychological Horror · Horror

Inside the Backrooms
Shared: Horror · Puzzle · Psychological Horror

Garten of Banban
Shared: Horror · Puzzle · Psychological Horror

Darkwood
Shared: Horror · Dark · Psychological Horror

Detention
Shared: Horror · Puzzle · Psychological Horror

Bendy and the Ink Machine
Shared: Horror · Puzzle · Dark

MADiSON
Shared: Horror · Dark · Puzzle

Resident Evil 7 Biohazard
Shared: Horror · Singleplayer · Atmospheric

The Room
Shared: Puzzle · Atmospheric · Horror

LIMBO
Shared: Puzzle · Dark · Horror

Among the Sleep - Enhanced Edition
Shared: Horror · Atmospheric · Dark