Games like Nightmares Market
Games like Nightmares Market include Firewatch, Journey, Sizeable, The House of Da Vinci, and What Remains of Edith Finch. We matched them by the tags players give Nightmares Market on Steam (Exploration, Hidden Object, Indie, Walking Simulator, and 3D): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Walking Simulator · Atmospheric · Exploration

Journey
Shared: Exploration · Indie · Atmospheric

Sizeable
Shared: Hidden Object · Indie · Exploration

The House of Da Vinci
Shared: Hidden Object · Exploration · Indie

What Remains of Edith Finch
Shared: Walking Simulator · Exploration · Atmospheric

Gone Home
Shared: Exploration · Walking Simulator · Indie

Interior Worlds
Shared: Exploration · Walking Simulator · Hidden Object

The Witness
Shared: Exploration · Indie · Singleplayer

ABZU
Shared: Exploration · Atmospheric · Indie

Cairn
Shared: Exploration · Indie · Atmospheric

Lushfoil Photography Sim
Shared: Exploration · Walking Simulator · Hidden Object

Scanner Sombre
Shared: Exploration · Walking Simulator · Atmospheric

The Long Dark
Shared: Exploration · Atmospheric · Singleplayer

Moncage
Shared: Indie · Casual · Singleplayer

NaissanceE
Shared: Exploration · Indie · Walking Simulator

Spirit of the North
Shared: Exploration · Atmospheric · Casual

The First Tree
Shared: Exploration · Indie · Walking Simulator

Everybody's Gone to the Rapture
Shared: Walking Simulator · Indie · Exploration

POOLS
Shared: Walking Simulator · Exploration · Atmospheric

Riven
Shared: Exploration · Singleplayer · Atmospheric

The Room
Shared: Hidden Object · Atmospheric · Indie

COCOON
Shared: Exploration · Indie · Atmospheric

The Stanley Parable
Shared: Indie · Walking Simulator · Exploration

Proteus
Shared: Exploration · Walking Simulator · Indie