Games like Noir
Games like Noir include Celeste, Super Meat Boy, Geometry Dash, Hollow Knight, and Hollow Knight: Silksong. We matched them by the tags players give Noir on Steam (Precision Platformer, 2D Platformer, Difficult, Indie, and Hand-drawn): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · Indie

Super Meat Boy
Shared: Precision Platformer · Difficult · 2D Platformer

Geometry Dash
Shared: Difficult · Precision Platformer · Indie

Hollow Knight
Shared: Difficult · Indie · Hand-drawn

Hollow Knight: Silksong
Shared: Difficult · Indie · Singleplayer

Planet of Lana
Shared: 2D Platformer · Puzzle Platformer · Action

N++ (NPLUSPLUS)
Shared: Precision Platformer · 2D Platformer · Difficult

VVVVVV
Shared: Precision Platformer · 2D Platformer · Indie

Rain World
Shared: Difficult · Indie · Atmospheric

Webbed
Shared: 2D Platformer · Puzzle Platformer · Cute

Jump King
Shared: Precision Platformer · Difficult · Indie

Super Meat Boy Forever
Shared: Difficult · Precision Platformer · Indie

Nine Sols
Shared: Difficult · Hand-drawn · Indie

SANABI
Shared: 2D Platformer · Action · Indie

LIMBO
Shared: Indie · Puzzle Platformer · Atmospheric

Downwell
Shared: Precision Platformer · Indie · 2D Platformer

Gimmick! 2
Shared: Precision Platformer · Difficult · 2D Platformer

Pizza Tower
Shared: 2D Platformer · Indie · Action

Braid
Shared: 2D Platformer · Puzzle Platformer · Indie

Trine Enchanted Edition
Shared: 2D Platformer · Puzzle Platformer · Colorful

Cuphead
Shared: Difficult · Indie · Hand-drawn

Ambidextro
Shared: Precision Platformer · 2D Platformer · Indie

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

Will You Snail?
Shared: Precision Platformer · Difficult · 2D Platformer