Games like The Shadowland
Games like The Shadowland include Hollow Knight, Hollow Knight: Silksong, Nine Sols, Blasphemous, and Blasphemous 2. We matched them by the tags players give The Shadowland on Steam (Metroidvania, Puzzle Platformer, 2D Platformer, Souls-like, and Difficult): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Souls-like · Platformer

Hollow Knight: Silksong
Shared: Metroidvania · Difficult · Souls-like

Nine Sols
Shared: Metroidvania · Souls-like · Difficult

Blasphemous
Shared: Metroidvania · Souls-like · 2D

Blasphemous 2
Shared: Metroidvania · Difficult · Souls-like

Salt and Sanctuary
Shared: Metroidvania · Souls-like · Difficult

Rain World
Shared: Difficult · Platformer · 2D

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

Momodora: Reverie Under The Moonlight
Shared: Metroidvania · 2D Platformer · Souls-like

Celeste
Shared: Difficult · 2D Platformer · Platformer

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

Well Dweller
Shared: Metroidvania · Action-Adventure · Horror

Aeterna Noctis
Shared: Metroidvania · Difficult · Souls-like

ANIMAL WELL
Shared: Metroidvania · Puzzle Platformer · Platformer

Afterimage
Shared: Metroidvania · 2D Platformer · Souls-like

LIMBO
Shared: Puzzle Platformer · Platformer · 2D

ENDER LILIES: Quietus of the Knights
Shared: Metroidvania · Souls-like · Difficult

Dead Cells
Shared: Metroidvania · Souls-like · 2D

Öoo
Shared: Metroidvania · Puzzle Platformer · 2D Platformer

La-Mulana 2
Shared: Metroidvania · Puzzle Platformer · Action-Adventure

GRIME
Shared: Metroidvania · Souls-like · Platformer

Webbed
Shared: 2D Platformer · Puzzle Platformer · Cute

TUNIC
Shared: Metroidvania · Souls-like · Action-Adventure

The Messenger
Shared: Metroidvania · Platformer · 2D Platformer