Games like Aquarelle
Games like Aquarelle include Firewatch, Journey, Fallout 4, BABBDI, and Sable. We matched them by the tags players give Aquarelle on Steam (Adventure, Surreal, Relaxing, Atmospheric, and Exploration): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Atmospheric · Walking Simulator

Journey
Shared: Adventure · Atmospheric · Relaxing

Fallout 4
Shared: Adventure · Open World · Exploration

BABBDI
Shared: Surreal · Atmospheric · Exploration

Sable
Shared: Atmospheric · Adventure · Exploration

POOLS
Shared: Atmospheric · Exploration · Surreal

The Long Dark
Shared: Atmospheric · Exploration · Adventure

What Remains of Edith Finch
Shared: Atmospheric · Adventure · Exploration

The Witness
Shared: Exploration · Open World · Atmospheric

DEATH STRANDING DIRECTOR'S CUT
Shared: Atmospheric · Open World · Adventure

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

Eastshade
Shared: Adventure · Exploration · Atmospheric

Outer Wilds
Shared: Adventure · Exploration · Atmospheric

ABZU
Shared: Relaxing · Atmospheric · Adventure

Red Dead Redemption 2
Shared: Adventure · Open World · Atmospheric

The First Tree
Shared: Adventure · Atmospheric · Relaxing

AER Memories of Old
Shared: Adventure · Relaxing · Exploration

The Witcher 3: Wild Hunt — Remastered
Shared: Adventure · Atmospheric · Open World

Cairn
Shared: Adventure · Exploration · Atmospheric

Big Walk
Shared: Adventure · Exploration · Relaxing

Obduction
Shared: Adventure · Exploration · Surreal

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: Open World · Atmospheric · Exploration

NaissanceE
Shared: Exploration · Atmospheric · Adventure

Proteus
Shared: Relaxing · Exploration · Walking Simulator