Games like Ninja Smasher!
Games like Ninja Smasher! include Skul: The Hero Slayer, CARRION, Dead Cells, Gato Roboto, and Blasphemous. We matched them by the tags players give Ninja Smasher! on Steam (Action, Adventure, Indie, Pixel Graphics, and Metroidvania): closest matches first, and among equally close ones the better-known games.

Skul: The Hero Slayer
Shared: Action · Indie · Pixel Graphics

CARRION
Shared: Action · Pixel Graphics · Metroidvania

Dead Cells
Shared: Adventure · Metroidvania · Pixel Graphics

Gato Roboto
Shared: Action · Indie · Adventure

Blasphemous
Shared: Metroidvania · Pixel Graphics · Indie

Iconoclasts
Shared: Indie · Pixel Graphics · Action

Axiom Verge
Shared: Indie · Metroidvania · Pixel Graphics

The Messenger
Shared: Pixel Graphics · Metroidvania · Action

SANABI
Shared: Action · Pixel Graphics · Adventure

Hyper Light Drifter
Shared: Pixel Graphics · Indie · Adventure

Owlboy
Shared: Adventure · Pixel Graphics · Indie

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

Infernax
Shared: Action · Metroidvania · Pixel Graphics

ScourgeBringer
Shared: Action · Indie · Adventure

Dungeon Munchies
Shared: Action · Indie · Adventure

UNSIGHTED
Shared: Action · Adventure · Metroidvania

Hollow Knight: Silksong
Shared: Indie · Metroidvania · Adventure

Chasm
Shared: Indie · Adventure · Pixel Graphics

Environmental Station Alpha
Shared: Adventure · Pixel Graphics · Metroidvania

Hollow Knight
Shared: Metroidvania · Indie · Adventure

MO:Astray
Shared: Action · Indie · Adventure

Lost Ruins
Shared: Action · Pixel Graphics · Metroidvania

Deaths Gambit: Afterlife
Shared: Pixel Graphics · Metroidvania · Action

Rogue Legacy 2
Shared: Action · Metroidvania · Indie