Games like Dark Matter
Games like Dark Matter include Bloodstained: Ritual of the Night, ICEY, Hollow Knight: Silksong, Skul: The Hero Slayer, and Ghost 1.0. We matched them by the tags players give Dark Matter on Steam (Action, Indie, Side Scroller, Sci-fi, and Metroidvania): closest matches first, and among equally close ones the better-known games.

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

ICEY
Shared: Action · Side Scroller · Indie

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

Skul: The Hero Slayer
Shared: Action · Indie · Metroidvania

Ghost 1.0
Shared: Indie · Action · Metroidvania

The Vagrant
Shared: Action · Female Protagonist · Side Scroller

Shantae: Half-Genie Hero
Shared: Action · Metroidvania · Female Protagonist

Bright Memory: Infinite
Shared: Action · Indie · Female Protagonist

Axiom Verge
Shared: Indie · Metroidvania · Action

Hollow Knight
Shared: Metroidvania · Indie · Platformer

CARRION
Shared: Action · Metroidvania · Indie

Resident Evil 3
Shared: Action · Female Protagonist · Horror

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

Gato Roboto
Shared: Indie · Action · Metroidvania

Rogue Legacy
Shared: Indie · Action · Platformer

Alien: Isolation
Shared: Sci-fi · Horror · Survival Horror

Iconoclasts
Shared: Indie · Action · Metroidvania

Rogue Legacy 2
Shared: Action · Indie · Metroidvania

Dex
Shared: Action · Side Scroller · Female Protagonist

Deadlight
Shared: Action · Indie · Side Scroller

Silver Pines
Shared: Metroidvania · Side Scroller · Horror

Indivisible
Shared: Indie · Action · Metroidvania

Ghost Song
Shared: Action · Sci-fi · Metroidvania

My Friend Pedro
Shared: Action · Indie · Side Scroller