Games like In The Darkness
Games like In The Darkness include Hollow Knight, Hollow Knight: Silksong, Ori and the Will of the Wisps, Nine Sols, and Touhou Luna Nights. We matched them by the tags players give In The Darkness on Steam (Metroidvania, Exploration, Mystery Dungeon, Dungeon Crawler, and Action): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Difficult · Exploration

Hollow Knight: Silksong
Shared: Metroidvania · Difficult · Exploration

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

Nine Sols
Shared: Metroidvania · Difficult · Action

Touhou Luna Nights
Shared: Metroidvania · Exploration · Difficult

ANIMAL WELL
Shared: Metroidvania · Exploration · 2D

Rain World
Shared: Exploration · Difficult · 2D

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

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

TUNIC
Shared: Exploration · Metroidvania · Difficult

Pronty
Shared: Metroidvania · Action · Exploration

Hyper Light Drifter
Shared: Difficult · Action · Exploration

Blasphemous
Shared: Metroidvania · 2D · Difficult

Constance
Shared: Metroidvania · Action · 2D

Dust: An Elysian Tail
Shared: Metroidvania · Action · 2D

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

Salt and Sanctuary
Shared: Metroidvania · Difficult · 2D

Cave Story+
Shared: Metroidvania · Exploration · Difficult

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

Crypt Custodian
Shared: Metroidvania · Exploration · Action

Souldiers
Shared: Metroidvania · Action · Action-Adventure

Well Dweller
Shared: Metroidvania · Action · Action-Adventure

La-Mulana
Shared: Metroidvania · Exploration · Difficult

Axiom Verge
Shared: Metroidvania · Action · 2D