Games like Tenko's Magical Sword Quest
Games like Tenko's Magical Sword Quest include Celeste, Super Meat Boy, Downwell, SANABI, and Jump King. We matched them by the tags players give Tenko's Magical Sword Quest on Steam (Precision Platformer, Difficult, Platformer, 2D, and Indie): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · Platformer

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

Downwell
Shared: Precision Platformer · Platformer · Pixel Graphics

SANABI
Shared: Pixel Graphics · 2D Platformer · 2D

Jump King
Shared: Difficult · Precision Platformer · Indie

VVVVVV
Shared: Precision Platformer · Platformer · Pixel Graphics

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

Hollow Knight
Shared: Platformer · Difficult · 2D

Pizza Tower
Shared: Indie · 2D Platformer · Platformer

Katana ZERO
Shared: Pixel Graphics · Platformer · Indie

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

Hollow Knight: Silksong
Shared: Difficult · Indie · 2D

Rain World
Shared: Difficult · Indie · Platformer

The End Is Nigh
Shared: Precision Platformer · Platformer · Difficult

Skul: The Hero Slayer
Shared: Indie · 2D · Pixel Graphics

The Messenger
Shared: Platformer · 2D · Pixel Graphics

NINJA GAIDEN: Ragebound
Shared: Platformer · Pixel Graphics · 2D Platformer

Gravity Circuit
Shared: Platformer · Indie · 2D

Freedom Planet
Shared: Platformer · 2D · Indie

Super Meat Boy Forever
Shared: Difficult · Precision Platformer · Indie

Rogue Legacy 2
Shared: Platformer · Indie · Difficult

Out There Somewhere
Shared: Platformer · Indie · Pixel Graphics

Volgarr the Viking
Shared: Difficult · Platformer · Indie

Blasphemous
Shared: Pixel Graphics · 2D · Difficult