Games like Cody's Nightmare
Games like Cody's Nightmare include Celeste, Super Meat Boy, Pizza Tower, Katana ZERO, and SANABI. We matched them by the tags players give Cody's Nightmare on Steam (2D Platformer, Shoot 'Em Up, Pixel Graphics, Difficult, and Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Pixel Graphics · Difficult · 2D Platformer

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

Pizza Tower
Shared: 2D Platformer · Pixel Graphics · Platformer

Katana ZERO
Shared: Pixel Graphics · 2D Platformer · Platformer

SANABI
Shared: Pixel Graphics · 2D Platformer · 2D

Rain World
Shared: Difficult · Pixel Graphics · Platformer

Cuphead
Shared: Difficult · Platformer · 2D

VVVVVV
Shared: Pixel Graphics · 2D Platformer · Platformer

Broforce
Shared: Pixel Graphics · Platformer · 2D

Downwell
Shared: Pixel Graphics · 2D Platformer · Platformer

Hollow Knight
Shared: Platformer · Difficult · 2D

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Platformer · Difficult

The Messenger
Shared: Pixel Graphics · Platformer · 2D Platformer

Bit Blaster XL
Shared: Shoot 'Em Up · Difficult · Shooter

Gravity Circuit
Shared: Pixel Graphics · Platformer · 2D Platformer

Skul: The Hero Slayer
Shared: Pixel Graphics · Indie · 2D

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Pixel Graphics · Difficult

Noita
Shared: Pixel Graphics · Difficult · 2D

Jump King
Shared: Difficult · Pixel Graphics · Platformer

Geometry Dash
Shared: Difficult · 2D · Platformer

UFO 50
Shared: Pixel Graphics · Indie · 2D

Webbed
Shared: 2D Platformer · Pixel Graphics · Platformer

Huntdown
Shared: Pixel Graphics · Shoot 'Em Up · Shooter

Hollow Knight: Silksong
Shared: Difficult · Indie · Platformer