Games like Into The Underdusk
Games like Into The Underdusk include Hollow Knight, Hollow Knight: Silksong, Ori and the Will of the Wisps, Nine Sols, and Celeste. We matched them by the tags players give Into The Underdusk on Steam (Metroidvania, Precision Platformer, Difficult, Action, and Platformer): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Difficult · Platformer

Hollow Knight: Silksong
Shared: Metroidvania · Difficult · Platformer

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

Nine Sols
Shared: Metroidvania · Difficult · Platformer

Celeste
Shared: Precision Platformer · Difficult · Platformer

Dead Cells
Shared: Metroidvania · Adventure · 2D

Blasphemous
Shared: Metroidvania · Difficult · 2D

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

Jump King
Shared: Precision Platformer · Difficult · Platformer

SANABI
Shared: Action · Adventure · Pixel Graphics

Skul: The Hero Slayer
Shared: Action · Metroidvania · 2D

Rain World
Shared: Difficult · Platformer · 2D

Touhou Luna Nights
Shared: Metroidvania · Difficult · Platformer

Salt and Sanctuary
Shared: Metroidvania · Difficult · Action

Rusted Moss
Shared: Metroidvania · Platformer · Action

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

Prince of Persia The Lost Crown
Shared: Metroidvania · Action · Precision Platformer

Aeterna Noctis
Shared: Metroidvania · Difficult · Precision Platformer

The End Is Nigh
Shared: Precision Platformer · Difficult · Platformer

Rogue Legacy 2
Shared: Metroidvania · Action · Platformer

Blasphemous 2
Shared: Difficult · Metroidvania · Adventure

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

The Messenger
Shared: Metroidvania · Platformer · Action

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