Games like Cathedral
Games like Cathedral include Hollow Knight, Skul: The Hero Slayer, Hollow Knight: Silksong, Shovel Knight: Treasure Trove, and Gato Roboto. We matched them by the tags players give Cathedral on Steam (Action, Indie, Metroidvania, Adventure, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Indie · Platformer

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

Hollow Knight: Silksong
Shared: Metroidvania · Indie · Difficult

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

Gato Roboto
Shared: Indie · Action · Metroidvania

SANABI
Shared: Action · Pixel Graphics · Adventure

Blasphemous
Shared: Metroidvania · Pixel Graphics · Indie

Bloodstained: Curse of the Moon
Shared: Action · Pixel Graphics · Metroidvania

The Messenger
Shared: Metroidvania · Retro · Pixel Graphics

Axiom Verge
Shared: Indie · Metroidvania · Action

Celeste
Shared: Indie · Pixel Graphics · Difficult

Dead Cells
Shared: Adventure · Metroidvania · Pixel Graphics

Rogue Legacy 2
Shared: Metroidvania · Action · Indie

Nine Sols
Shared: Metroidvania · Action · Difficult

Jump King
Shared: Indie · Pixel Graphics · Adventure

Dust: An Elysian Tail
Shared: Action · Metroidvania · Indie

Broforce
Shared: Action · Pixel Graphics · Indie

Out There Somewhere
Shared: Indie · Pixel Graphics · Platformer

Ori and the Will of the Wisps
Shared: Metroidvania · Action · Platformer

Angry Video Game Nerd Adventures
Shared: Indie · Action · Platformer

Rogue Legacy
Shared: Indie · Action · Platformer

Environmental Station Alpha
Shared: Metroidvania · Indie · Adventure

Super Meat Boy
Shared: Indie · Platformer · Pixel Graphics

CARRION
Shared: Action · Metroidvania · Pixel Graphics