Games like Wittengrad is no more
Games like Wittengrad is no more include Firewatch, What Remains of Edith Finch, The Beginner's Guide, Gone Home, and Layers of Fear (2016). We matched them by the tags players give Wittengrad is no more on Steam (Adventure, Walking Simulator, 3D, First-Person, and Linear): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · First-Person

What Remains of Edith Finch
Shared: Walking Simulator · Adventure · Story Rich

The Beginner's Guide
Shared: Walking Simulator · Story Rich · First-Person

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

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

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

MiSide
Shared: First-Person · Story Rich · 3D

Mouthwashing
Shared: Story Rich · Walking Simulator · Atmospheric

Before Your Eyes
Shared: First-Person · Story Rich · Walking Simulator

The Suicide of Rachel Foster
Shared: Walking Simulator · Adventure · Atmospheric

Poppy Playtime
Shared: Singleplayer · First-Person · Adventure

Still Wakes the Deep
Shared: Walking Simulator · First-Person · Adventure

Little Nightmares
Shared: Adventure · Singleplayer · Atmospheric

Outer Wilds
Shared: Adventure · Story Rich · Atmospheric

The Park®
Shared: Walking Simulator · First-Person · Adventure

Among the Sleep - Enhanced Edition
Shared: Adventure · First-Person · Walking Simulator

Garten of Banban
Shared: First-Person · Singleplayer · 3D

The Room
Shared: Adventure · Singleplayer · Atmospheric

From The Darkness
Shared: First-Person · Walking Simulator · Adventure

SOMA
Shared: Story Rich · Atmospheric · First-Person

Sally Face - Episode One
Shared: Adventure · Story Rich · Dark

Outlast
Shared: First-Person · Atmospheric · Singleplayer

Little Nightmares II
Shared: Adventure · Singleplayer · Atmospheric

Quern - Undying Thoughts
Shared: Adventure · Walking Simulator · First-Person