Games like Raider Kid and the Ruby Chest
Games like Raider Kid and the Ruby Chest include Hollow Knight, The Messenger, Gato Roboto, Hollow Knight: Silksong, and Axiom Verge. We matched them by the tags players give Raider Kid and the Ruby Chest on Steam (Indie, Metroidvania, Action, Pixel Graphics, and Exploration): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Indie · Platformer

The Messenger
Shared: Metroidvania · Pixel Graphics · Platformer

Gato Roboto
Shared: Indie · Metroidvania · Action

Hollow Knight: Silksong
Shared: Metroidvania · Indie · Exploration

Axiom Verge
Shared: Indie · Metroidvania · Pixel Graphics

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

VVVVVV
Shared: Indie · Pixel Graphics · Platformer

Katana ZERO
Shared: Action · Pixel Graphics · Indie

Super Meat Boy
Shared: Indie · Platformer · Pixel Graphics

SANABI
Shared: Pixel Graphics · Action · Indie

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

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

F.I.S.T.: Forged In Shadow Torch
Shared: Metroidvania · Action · Platformer

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

Rogue Legacy
Shared: Indie · Action · Platformer

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

ANIMAL WELL
Shared: Metroidvania · Exploration · Pixel Graphics

Rain World
Shared: Indie · Exploration · Pixel Graphics

Celeste
Shared: Indie · Pixel Graphics · 2D Platformer

Gravity Circuit
Shared: Indie · Action · Pixel Graphics

Blasphemous
Shared: Metroidvania · Pixel Graphics · Indie

Xeodrifter
Shared: Indie · Metroidvania · Pixel Graphics

UnEpic
Shared: Indie · Metroidvania · Action

CARRION
Shared: Metroidvania · Pixel Graphics · Action