Games like A Highland Song
Games like A Highland Song include Hollow Knight, Hollow Knight: Silksong, GRIS, Night in the Woods, and Sable. We matched them by the tags players give A Highland Song on Steam (Exploration, 2D Platformer, Nature, Female Protagonist, and Dynamic Narration): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Exploration · Platformer · Atmospheric

Hollow Knight: Silksong
Shared: Exploration · Female Protagonist · Indie

GRIS
Shared: Female Protagonist · Atmospheric · Adventure

Night in the Woods
Shared: Exploration · Story Rich · Atmospheric

Sable
Shared: Exploration · Atmospheric · Story Rich

Tomb Raider Game of the Year
Shared: Female Protagonist · Exploration · Adventure

Rise of the Tomb Raider™
Shared: Female Protagonist · Exploration · Adventure

What Remains of Edith Finch
Shared: Exploration · Story Rich · Atmospheric

Celeste
Shared: 2D Platformer · Female Protagonist · Story Rich

OneShot
Shared: Story Rich · Atmospheric · Exploration

Firewatch
Shared: Story Rich · Atmospheric · Exploration

Carto
Shared: Exploration · Female Protagonist · Story Rich

Rain World
Shared: Exploration · Atmospheric · 2D Platformer

Detroit: Become Human
Shared: Story Rich · Choices Matter · Singleplayer

Outer Wilds
Shared: Exploration · Story Rich · Atmospheric

Neva
Shared: Atmospheric · Adventure · Female Protagonist

Fallout 4
Shared: Exploration · Atmospheric · Adventure

Life is Strange: Before the Storm
Shared: Story Rich · Female Protagonist · Choices Matter

Oxenfree
Shared: Story Rich · Female Protagonist · Atmospheric

Ori and the Will of the Wisps
Shared: Exploration · Atmospheric · Story Rich

AER Memories of Old
Shared: Exploration · Adventure · Female Protagonist

FAR: Lone Sails
Shared: Exploration · Atmospheric · Adventure

SANABI
Shared: 2D Platformer · Story Rich · Adventure

Road 96
Shared: Story Rich · Choices Matter · Atmospheric