Games like Kinsfolk
Games like Kinsfolk include Firewatch, What Remains of Edith Finch, Journey, ABZU, and Outer Wilds. We matched them by the tags players give Kinsfolk on Steam (Adventure, Casual, Atmospheric, Story Rich, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Atmospheric · Story Rich

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

Journey
Shared: Adventure · Atmospheric · Exploration

ABZU
Shared: Atmospheric · Adventure · Casual

Outer Wilds
Shared: Adventure · Story Rich · Exploration

Gone Home
Shared: Walking Simulator · Atmospheric · Short

The First Tree
Shared: Adventure · Atmospheric · Walking Simulator

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

DEATH STRANDING DIRECTOR'S CUT
Shared: Story Rich · Atmospheric · Walking Simulator

Brothers - A Tale of Two Sons
Shared: Adventure · Atmospheric · Story Rich

GRIS
Shared: Atmospheric · Adventure · Indie

Spirit of the North
Shared: Adventure · Atmospheric · Casual

A Short Hike
Shared: Adventure · Exploration · Casual

FAR: Lone Sails
Shared: Adventure · Atmospheric · Exploration

Everybody's Gone to the Rapture
Shared: Atmospheric · Adventure · Walking Simulator

The Room
Shared: Atmospheric · Adventure · Mystery

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

AER Memories of Old
Shared: Adventure · Atmospheric · Exploration

OneShot
Shared: Story Rich · Atmospheric · Adventure

The Witness
Shared: Exploration · Atmospheric · Adventure

Gorogoa
Shared: Atmospheric · Casual · Adventure

DAVE THE DIVER
Shared: Casual · Adventure · Exploration

Amnesia: A Machine For Pigs
Shared: Atmospheric · Story Rich · Walking Simulator

Chants of Sennaar
Shared: Adventure · Atmospheric · Singleplayer