Games like Sunken Sky
Games like Sunken Sky include Bloodstained: Ritual of the Night, Afterimage, Hollow Knight, Ori and the Will of the Wisps, and Hollow Knight: Silksong. We matched them by the tags players give Sunken Sky on Steam (Metroidvania, 2D Platformer, Open World, Action, and Anime): closest matches first, and among equally close ones the better-known games.

Bloodstained: Ritual of the Night
Shared: Metroidvania · Action · Female Protagonist

Afterimage
Shared: Metroidvania · 2D Platformer · Female Protagonist

Hollow Knight
Shared: Metroidvania · Platformer · 2D

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

Hollow Knight: Silksong
Shared: Metroidvania · Platformer · Female Protagonist

Castlevania: Belmont's Curse
Shared: Metroidvania · 2D Platformer · Action

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

Rise of the Tomb Raider™
Shared: Action · Adventure · Open World

The Witcher 3: Wild Hunt — Remastered
Shared: Open World · Adventure · RPG

ICEY
Shared: Action · Anime · Female Protagonist

The Vagrant
Shared: Action · Metroidvania · Female Protagonist

DRAGON BALL Z: KAKAROT
Shared: Action · Open World · Anime

F.I.S.T.: Forged In Shadow Torch
Shared: Metroidvania · Action · 2D Platformer

Wuthering Waves
Shared: Open World · Anime · Action

SANABI
Shared: Action · 2D Platformer · Adventure

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

STAR WARS Jedi: Fallen Order™
Shared: Open World · Action-Adventure · Action

Crimson Desert Enhanced
Shared: Open World · Action · Adventure

NieR:Automata™
Shared: Action · Female Protagonist · Open World

Hogwarts Legacy
Shared: Open World · Adventure · RPG

Gestalt: Steam & Cinder
Shared: Metroidvania · Action · 2D Platformer

Nine Sols
Shared: Metroidvania · Action · Platformer

Rabi-Ribi
Shared: Metroidvania · Anime · Female Protagonist

Tomb Raider Game of the Year
Shared: Action · Adventure · Female Protagonist