Games like Solo
Games like Solo include OneShot, Stray, Chants of Sennaar, Outer Wilds, and Carto. We matched them by the tags players give Solo on Steam (Adventure, Indie, Puzzle, Exploration, and Narrative): closest matches first, and among equally close ones the better-known games.

OneShot
Shared: Indie · Story Rich · Puzzle

Stray
Shared: Adventure · Exploration · Singleplayer

Chants of Sennaar
Shared: Adventure · Puzzle · Indie

Outer Wilds
Shared: Exploration · Adventure · Puzzle

Carto
Shared: Indie · Puzzle · Exploration

Tomb Raider Game of the Year
Shared: Adventure · Singleplayer · Exploration

The Last Campfire
Shared: Adventure · Puzzle · Indie

Brothers - A Tale of Two Sons
Shared: Adventure · Indie · Puzzle

Rise of the Tomb Raider™
Shared: Adventure · Singleplayer · Exploration

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

GRIS
Shared: Indie · Adventure · Singleplayer

FAR: Lone Sails
Shared: Adventure · Exploration · Indie

Gone Home
Shared: Indie · Exploration · Narrative

Firewatch
Shared: Adventure · Story Rich · Exploration

Florence
Shared: Indie · Adventure · Story Rich

Behind the Frame: The Finest Scenery
Shared: Puzzle · Singleplayer · Story Rich

WILL: A Wonderful World / WILL:美好世界
Shared: Adventure · Puzzle · Exploration

Bugsnax
Shared: Adventure · Singleplayer · Story Rich

Call of the Sea
Shared: Adventure · Puzzle · Indie

Slime Rancher
Shared: Adventure · Exploration · Singleplayer

Hollow Knight: Silksong
Shared: Indie · Singleplayer · Exploration

Little Nightmares
Shared: Adventure · Singleplayer · Puzzle

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

Sable
Shared: Exploration · Adventure · Story Rich