Games like Viaerium
Games like Viaerium include Refunct, The Beginner's Guide, Journey, ABZU, and Hook. We matched them by the tags players give Viaerium on Steam (Relaxing, Atmospheric, Walking Simulator, Indie, and Emotional): closest matches first, and among equally close ones the better-known games.

Refunct
Shared: Relaxing · 3D Platformer · Atmospheric

The Beginner's Guide
Shared: Walking Simulator · Atmospheric · Indie

Journey
Shared: Atmospheric · Relaxing · Indie

ABZU
Shared: Relaxing · Atmospheric · Indie

Hook
Shared: Relaxing · Minimalist · Indie

Neva
Shared: Atmospheric · Indie · Emotional

Kind Words (lo fi chill beats to write to)
Shared: Relaxing · Emotional · Atmospheric

GRIS
Shared: Atmospheric · Indie · Relaxing

Townscaper
Shared: Relaxing · Indie · Short

The Last Campfire
Shared: Atmospheric · Indie · Relaxing

The First Tree
Shared: Atmospheric · Walking Simulator · Relaxing

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

Firewatch
Shared: Atmospheric · Walking Simulator · Indie

klocki
Shared: Relaxing · Minimalist · Indie

Gone Home
Shared: Walking Simulator · Indie · Atmospheric

Assemble with Care
Shared: Relaxing · Indie · Short

ISLANDERS
Shared: Relaxing · Indie · Minimalist

Monument Valley 3
Shared: Relaxing · Atmospheric · Colorful

LOST EMBER
Shared: Atmospheric · Relaxing · Emotional

A Short Hike
Shared: Relaxing · Indie · Short

Flower
Shared: Relaxing · Atmospheric · Indie

Zenge
Shared: Indie · Relaxing · Minimalist

LYNE
Shared: Relaxing · Minimalist · Atmospheric

Sudoku Universe / 数独宇宙
Shared: Indie · Relaxing · Atmospheric