Games like 異洋館・異和館-The Disturbed Mansion
Games like 異洋館・異和館-The Disturbed Mansion include Firewatch, Poppy Playtime, What Remains of Edith Finch, Layers of Fear (2016), and Garten of Banban. We matched them by the tags players give 異洋館・異和館-The Disturbed Mansion on Steam (Adventure, Walking Simulator, 3D Platformer, 3D, and Horror): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · Mystery

Poppy Playtime
Shared: Horror · Singleplayer · Free to Play

What Remains of Edith Finch
Shared: Walking Simulator · Adventure · Mystery

Layers of Fear (2016)
Shared: Walking Simulator · Horror · Adventure

Garten of Banban
Shared: Horror · Singleplayer · 3D

CARIMARA: Beneath the forlorn limbs
Shared: Adventure · Mystery · Horror

Samsara Room
Shared: Adventure · Indie · Free to Play

Bad Parenting 1: Mr. Red Face
Shared: Adventure · Walking Simulator · Horror

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

Outer Wilds
Shared: Adventure · Mystery · Singleplayer

The Room Three
Shared: Adventure · Mystery · Indie

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Horror · Adventure

The Room
Shared: Adventure · Mystery · Singleplayer

The Death | Thần Trùng
Shared: Adventure · Horror · Indie

The Room 4: Old Sins
Shared: Adventure · Mystery · Singleplayer

Little Nightmares
Shared: Adventure · Horror · Singleplayer

Dark Deception
Shared: Horror · Free to Play · Singleplayer

VERGE:Lost chapter
Shared: Walking Simulator · Adventure · Horror

Psalm 5:9-13
Shared: Horror · Walking Simulator · Indie

Sally Face - Episode One
Shared: Adventure · Horror · Indie

The Room Two
Shared: Mystery · Adventure · Horror

The Vanishing of Ethan Carter
Shared: Walking Simulator · Mystery · Adventure

Little Nightmares II
Shared: Adventure · Horror · Singleplayer

Investigator
Shared: Adventure · Walking Simulator · Horror