Games like Spiral
Games like Spiral include Firewatch, Copycat, What Remains of Edith Finch, Brothers - A Tale of Two Sons, and The Beginner's Guide. We matched them by the tags players give Spiral on Steam (Story Rich, Emotional, Walking Simulator, Indie, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Story Rich · Walking Simulator · Atmospheric

Copycat
Shared: Emotional · Story Rich · Indie

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

Brothers - A Tale of Two Sons
Shared: Story Rich · Emotional · Indie

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

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

Before Your Eyes
Shared: Emotional · Story Rich · Indie

Journey
Shared: Indie · Atmospheric · Exploration

Cairn
Shared: Indie · Exploration · Singleplayer

Gone Home
Shared: Walking Simulator · Indie · Story Rich

Detroit: Become Human
Shared: Story Rich · Emotional · Singleplayer

LOST EMBER
Shared: Emotional · Story Rich · Singleplayer

My Little Puppy
Shared: Emotional · Story Rich · Singleplayer

To the Moon
Shared: Story Rich · Emotional · Indie

Tomb Raider Game of the Year
Shared: Story Rich · Singleplayer · Third Person

Spirit of the North
Shared: Story Rich · Exploration · Atmospheric

OneShot
Shared: Story Rich · Indie · Singleplayer

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Emotional · Story Rich · Indie

God of War
Shared: Story Rich · Singleplayer · Third Person

The Last Campfire
Shared: Singleplayer · Indie · Emotional

Outer Wilds
Shared: Story Rich · Exploration · Atmospheric

Mixtape
Shared: Walking Simulator · Singleplayer · Soundtrack

The First Tree
Shared: Walking Simulator · Indie · Story Rich

The Witcher 3: Wild Hunt — Remastered
Shared: Story Rich · Singleplayer · Atmospheric