Games like Celeste
Games like Celeste include Super Meat Boy, Hollow Knight: Silksong, Hollow Knight, SANABI, and Katana ZERO. We matched them by the tags players give Celeste on Steam (Precision Platformer, Difficult, Pixel Graphics, Indie, and Platformer): closest matches first, and among equally close ones the better-known games.

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

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

Hollow Knight
Shared: Difficult · Platformer · Great Soundtrack

SANABI
Shared: Pixel Graphics · 2D Platformer · Indie

Katana ZERO
Shared: Pixel Graphics · Great Soundtrack · Platformer

Geometry Dash
Shared: Difficult · Great Soundtrack · Precision Platformer

VVVVVV
Shared: Precision Platformer · Pixel Graphics · Indie

Pizza Tower
Shared: Great Soundtrack · Indie · 2D Platformer

Jump King
Shared: Difficult · Precision Platformer · Pixel Graphics

The End Is Nigh
Shared: Precision Platformer · Difficult · Indie

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Platformer · Great Soundtrack

OneShot
Shared: Pixel Graphics · Great Soundtrack · Indie

Rain World
Shared: Difficult · Pixel Graphics · Indie

GRIS
Shared: Great Soundtrack · Indie · Female Protagonist

Downwell
Shared: Precision Platformer · Pixel Graphics · Indie

Freedom Planet
Shared: Great Soundtrack · Platformer · Pixel Graphics

Hyper Light Drifter
Shared: Pixel Graphics · Great Soundtrack · Difficult

The Binding of Isaac: Rebirth
Shared: Difficult · Indie · Pixel Graphics

To the Moon
Shared: Great Soundtrack · Pixel Graphics · Indie

Ori and the Will of the Wisps
Shared: Great Soundtrack · Platformer · Singleplayer

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

Electronic Super Joy
Shared: Difficult · Great Soundtrack · Indie

Undertale
Shared: Great Soundtrack · Pixel Graphics · Indie

The Messenger
Shared: Pixel Graphics · Platformer · Great Soundtrack