Games like Pieces Left Behind
Games like Pieces Left Behind include Firewatch, What Remains of Edith Finch, Before Your Eyes, Gone Home, and The Beginner's Guide. We matched them by the tags players give Pieces Left Behind on Steam (Story Rich, Relaxing, Narrative, Walking Simulator, and Indie): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Story Rich · Walking Simulator · Atmospheric

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

Before Your Eyes
Shared: Story Rich · Narrative · Indie

Gone Home
Shared: Walking Simulator · Indie · Story Rich

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

Journey
Shared: Relaxing · Indie · Exploration

Behind the Frame: The Finest Scenery
Shared: Story Rich · Relaxing · Singleplayer

The First Tree
Shared: Walking Simulator · Relaxing · Indie

ABZU
Shared: Relaxing · Exploration · Atmospheric

LOST EMBER
Shared: Relaxing · Story Rich · Exploration

The Witness
Shared: Exploration · First-Person · Indie

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

Outer Wilds
Shared: Story Rich · Exploration · Atmospheric

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

Copycat
Shared: Story Rich · Indie · Emotional

Riven
Shared: Story Rich · Exploration · First-Person

The Last Campfire
Shared: Indie · Relaxing · Story Rich

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

GRIS
Shared: Indie · Atmospheric · Relaxing

The Talos Principle
Shared: Story Rich · First-Person · Singleplayer

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

The Stanley Parable
Shared: Walking Simulator · Indie · First-Person

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

Fallout 4
Shared: Exploration · Singleplayer · Story Rich