Games like Hundred Doors
Games like Hundred Doors include Firewatch, What Remains of Edith Finch, Journey, Bad Parenting 1: Mr. Red Face, and Fears to Fathom - Woodbury Getaway. We matched them by the tags players give Hundred Doors on Steam (Casual, Adventure, Walking Simulator, Exploration, and FPS): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · Exploration

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

Journey
Shared: Adventure · Exploration · Walking Simulator

Bad Parenting 1: Mr. Red Face
Shared: Adventure · Walking Simulator · 3D

Fears to Fathom - Woodbury Getaway
Shared: Adventure · Casual · First-Person

CARIMARA: Beneath the forlorn limbs
Shared: Adventure · Exploration · 3D

PEAK
Shared: Adventure · Exploration · First-Person

Scanner Sombre
Shared: Walking Simulator · Exploration · Adventure

The Exit 8
Shared: Exploration · Walking Simulator · First-Person

Millennium Dream
Shared: Adventure · Walking Simulator · Exploration

Fears to Fathom® - Scratch Creek
Shared: Adventure · Casual · Walking Simulator

Hypnagogia² 無限の夢 Boundless Dreams
Shared: Adventure · Exploration · Walking Simulator

Slime Rancher
Shared: Adventure · Exploration · First-Person

Layers of Fear (2016)
Shared: Walking Simulator · Adventure · First-Person

Gone Home
Shared: Walking Simulator · Exploration · First-Person

Echo Point Nova
Shared: FPS · Exploration · First-Person

Inside the Backrooms
Shared: Adventure · Exploration · Horror

RV There Yet?
Shared: Adventure · Exploration · First-Person

Cairn
Shared: Exploration · Adventure · Stylized

Riven
Shared: Adventure · Exploration · First-Person

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Exploration · First-Person

NaissanceE
Shared: Exploration · Walking Simulator · Adventure

Amenti
Shared: Adventure · Exploration · Walking Simulator

Amanda the Adventurer
Shared: First-Person · Adventure · 1990's