Games like The Magnificent Trufflepigs
Games like The Magnificent Trufflepigs include Firewatch, What Remains of Edith Finch, The Beginner's Guide, Gone Home, and The Room. We matched them by the tags players give The Magnificent Trufflepigs on Steam (Adventure, Story Rich, First-Person, Atmospheric, and Mystery): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Story Rich · Atmospheric

What Remains of Edith Finch
Shared: Story Rich · Atmospheric · First-Person

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

Gone Home
Shared: Atmospheric · First-Person · Story Rich

The Room
Shared: Mystery · Adventure · Atmospheric

Outer Wilds
Shared: Story Rich · Adventure · Mystery

A Story About My Uncle
Shared: Adventure · First-Person · Atmospheric

Return of the Obra Dinn
Shared: Story Rich · Mystery · Atmospheric

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

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

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

Call of the Sea
Shared: Adventure · Story Rich · First-Person

Before Your Eyes
Shared: Story Rich · First-Person · Adventure

Draugen
Shared: Story Rich · First-Person · Atmospheric

The Vanishing of Ethan Carter
Shared: Atmospheric · Mystery · Adventure

To the Moon
Shared: Story Rich · Adventure · Indie

A Bird Story
Shared: Story Rich · Adventure · Indie

The Suicide of Rachel Foster
Shared: Adventure · Atmospheric · Mystery

The Room Two
Shared: Mystery · Atmospheric · Adventure

Riven
Shared: Adventure · First-Person · Story Rich

The Room Three
Shared: Adventure · Mystery · Atmospheric

Gorogoa
Shared: Atmospheric · Singleplayer · Indie

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

Fallout 4
Shared: Adventure · Singleplayer · Atmospheric