Games like Rainy Day
Games like Rainy Day include Hoa, GRIS, TOEM: A Photo Adventure, Travellin Cats in Paris, and Neva. We matched them by the tags players give Rainy Day on Steam (Adventure, Hand-drawn, 2D Platformer, Free to Play, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Hoa
Shared: 2D Platformer · Hand-drawn · Atmospheric

GRIS
Shared: Atmospheric · Adventure · Hand-drawn

TOEM: A Photo Adventure
Shared: Adventure · Hand-drawn · Relaxing

Travellin Cats in Paris
Shared: Free to Play · Hand-drawn · Relaxing

Neva
Shared: Adventure · Atmospheric · Emotional

Thank Goodness You're Here!
Shared: Adventure · Hand-drawn · 2D Platformer

Carto
Shared: Hand-drawn · Adventure · Relaxing

The Last Campfire
Shared: Adventure · Atmospheric · Emotional

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

Palia
Shared: Free to Play · Adventure · Relaxing

Journey
Shared: Adventure · Atmospheric · Relaxing

Gorogoa
Shared: Hand-drawn · Atmospheric · Adventure

The Darkest Tales — Into the Nightmare
Shared: Adventure · Free to Play · 2D Platformer

Brawlhalla
Shared: Free to Play · 2D Platformer · Casual

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

Creaks
Shared: Hand-drawn · Atmospheric · Adventure

Samsara Room
Shared: Adventure · Free to Play · Indie

Laughing to Die
Shared: Adventure · 2D Platformer · Hand-drawn

ABZU
Shared: Atmospheric · Adventure · Relaxing

Forgotton Anne
Shared: Hand-drawn · Atmospheric · 2D Platformer

LUNA The Shadow Dust
Shared: Adventure · Hand-drawn · Atmospheric

Where Winds Meet
Shared: Free to Play · Adventure · Atmospheric

Planet of Lana
Shared: 2D Platformer · Atmospheric · Adventure

Chill with You : Lo-Fi Story
Shared: Atmospheric · Relaxing · Adventure