Games like The Sun and Moon
Games like The Sun and Moon include Katana ZERO, Hollow Knight, Celeste, Hollow Knight: Silksong, and Out There Somewhere. We matched them by the tags players give The Sun and Moon on Steam (Indie, Action, Platformer, Puzzle, and Difficult): closest matches first, and among equally close ones the better-known games.

Katana ZERO
Shared: Action · Platformer · Great Soundtrack

Hollow Knight
Shared: Platformer · Indie · Great Soundtrack

Celeste
Shared: Indie · Difficult · Great Soundtrack

Hollow Knight: Silksong
Shared: Indie · Difficult · Great Soundtrack

Out There Somewhere
Shared: Indie · Platformer · Puzzle

Shovel Knight: Treasure Trove
Shared: Platformer · Indie · Great Soundtrack

Cuphead
Shared: Platformer · Difficult · Indie

Super Meat Boy
Shared: Platformer · Indie · Difficult

Geometry Dash
Shared: Difficult · Great Soundtrack · 2D

Skul: The Hero Slayer
Shared: Indie · Action · Pixel Graphics

Risk of Rain (2013)
Shared: Indie · Platformer · Action

Pizza Tower
Shared: Indie · Great Soundtrack · Platformer

Hotline Miami
Shared: Action · Indie · Great Soundtrack

Gunpoint
Shared: Indie · Puzzle · Action

Defy Gravity Extended
Shared: Indie · Platformer · Puzzle

VVVVVV
Shared: Indie · Platformer · Pixel Graphics

Hotline Miami 2: Wrong Number
Shared: Great Soundtrack · Action · Pixel Graphics

The Binding of Isaac: Rebirth
Shared: Indie · Difficult · Great Soundtrack

SANABI
Shared: Action · Pixel Graphics · Indie

FEZ
Shared: Indie · Platformer · Puzzle

Broforce
Shared: Action · Platformer · Indie

Baba Is You
Shared: Indie · Puzzle · Difficult

Axiom Verge
Shared: Indie · Platformer · Action

The Messenger
Shared: Platformer · Indie · Action