Games like The Kitchen Knife
Games like The Kitchen Knife include Mouthwashing, What Remains of Edith Finch, Layers of Fear (2016), SOMA, and Sally Face - Episode One. We matched them by the tags players give The Kitchen Knife on Steam (Psychological Horror, Horror, Walking Simulator, Mystery, and Story Rich): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Psychological Horror · Horror · Story Rich

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

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

SOMA
Shared: Psychological Horror · Horror · Story Rich

Sally Face - Episode One
Shared: Psychological Horror · Horror · Story Rich

Firewatch
Shared: Walking Simulator · Story Rich · Atmospheric

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

Phasmophobia
Shared: Horror · Psychological Horror · First-Person

Still Wakes the Deep
Shared: Psychological Horror · Horror · Walking Simulator

No, I'm not a Human
Shared: Psychological Horror · Horror · Story Rich

Poppy Playtime
Shared: Horror · Psychological Horror · First-Person

Fran Bow
Shared: Psychological Horror · Horror · Story Rich

The Beginner's Guide
Shared: Walking Simulator · Story Rich · Atmospheric

Blair Witch
Shared: Horror · Psychological Horror · First-Person

Outlast
Shared: Horror · Psychological Horror · First-Person

MiSide
Shared: Psychological Horror · Horror · Story Rich

Layers of Fear 2 (2019)
Shared: Psychological Horror · Horror · Walking Simulator

God's Basement
Shared: Psychological Horror · Horror · Walking Simulator

DON'T SCREAM
Shared: Psychological Horror · Horror · Walking Simulator

Dagon: by H. P. Lovecraft
Shared: Horror · Psychological Horror · Atmospheric

The Painscreek Killings
Shared: Mystery · Horror · Story Rich

Outer Wilds
Shared: Mystery · Story Rich · Atmospheric

The Park®
Shared: Psychological Horror · Horror · Walking Simulator

Visage
Shared: Psychological Horror · Horror · First-Person