Games like RIN: The Last Child
Games like RIN: The Last Child include Hollow Knight, Ori and the Will of the Wisps, Hollow Knight: Silksong, Nine Sols, and Rain World. We matched them by the tags players give RIN: The Last Child on Steam (Metroidvania, Platformer, Action, Exploration, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Platformer · Difficult

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

Hollow Knight: Silksong
Shared: Metroidvania · Platformer · Difficult

Nine Sols
Shared: Metroidvania · Platformer · Action

Rain World
Shared: Exploration · Atmospheric · Platformer

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

Celeste
Shared: Platformer · Difficult · 2D Platformer

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

MIO: Memories in Orbit
Shared: Metroidvania · Platformer · Exploration

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

SANABI
Shared: Action · 2D Platformer · Story Rich

Constance
Shared: Metroidvania · Platformer · Action

Cave Story+
Shared: Metroidvania · Exploration · Platformer

Owlboy
Shared: Platformer · Metroidvania · Action

Tomb Raider Game of the Year
Shared: Action · Exploration · Story Rich

Laika: Aged Through Blood
Shared: Metroidvania · Atmospheric · Platformer

Islets
Shared: Metroidvania · Platformer · Atmospheric

Rogue Legacy 2
Shared: Metroidvania · Platformer · Action

Blasphemous 2
Shared: Metroidvania · Difficult · 2D Platformer

ANIMAL WELL
Shared: Metroidvania · Exploration · Platformer

Afterimage
Shared: Metroidvania · 2D Platformer · Exploration

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

Crypt Custodian
Shared: Metroidvania · Action · Exploration

Prince of Persia The Lost Crown
Shared: Metroidvania · Exploration · Action