Games like Ninjahtic
Games like Ninjahtic include Shovel Knight: Treasure Trove, Broforce, SANABI, Skul: The Hero Slayer, and Out There Somewhere. We matched them by the tags players give Ninjahtic on Steam (Action, Indie, Adventure, Pixel Graphics, and Retro): closest matches first, and among equally close ones the better-known games.

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Indie · Platformer

Broforce
Shared: Action · Pixel Graphics · Indie

SANABI
Shared: Action · Pixel Graphics · Adventure

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

Out There Somewhere
Shared: Indie · Pixel Graphics · Platformer

UFO 50
Shared: Indie · Action · Pixel Graphics

Gato Roboto
Shared: Indie · Action · Pixel Graphics

Axiom Verge
Shared: Indie · Pixel Graphics · Action

Katana ZERO
Shared: Action · Pixel Graphics · Indie

Jump King
Shared: Indie · Pixel Graphics · Adventure

The Messenger
Shared: Retro · Pixel Graphics · Platformer

Bloodstained: Curse of the Moon
Shared: Action · Pixel Graphics · Retro

Angry Video Game Nerd Adventures
Shared: Indie · Action · Platformer

Sonic Mania
Shared: Retro · Platformer · 2D

Celeste
Shared: Pixel Graphics · Indie · Platformer

Dungeon Munchies
Shared: Action · Indie · Adventure

Freedom Planet
Shared: Action · Platformer · Indie

Terraria
Shared: Pixel Graphics · Adventure · 2D

MO:Astray
Shared: Action · Indie · Adventure

Reventure
Shared: Indie · Adventure · Pixel Graphics

Dead Cells
Shared: Adventure · Pixel Graphics · 2D

VVVVVV
Shared: Pixel Graphics · Indie · Platformer

Super Meat Boy
Shared: Indie · Platformer · Pixel Graphics

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