Games like Mystic Strife
Games like Mystic Strife include Brawlhalla, Super Meat Boy, Celeste, Rivals of Aether, and Spelunky 2. We matched them by the tags players give Mystic Strife on Steam (2D Platformer, Archery, Difficult, Platformer, and 2D Fighter): closest matches first, and among equally close ones the better-known games.

Brawlhalla
Shared: 2D Platformer · 2D Fighter · Platformer

Super Meat Boy
Shared: 2D Platformer · Difficult · Platformer

Celeste
Shared: Difficult · 2D Platformer · Platformer

Rivals of Aether
Shared: 2D Fighter · Platformer · Pixel Graphics

Spelunky 2
Shared: 2D Platformer · Platformer · Difficult

Shovel Knight: Treasure Trove
Shared: Platformer · Difficult · 2D

Katana ZERO
Shared: 2D Platformer · Platformer · Action

Broforce
Shared: Platformer · 2D · Action

Rain World
Shared: Difficult · Platformer · 2D Platformer

TowerFall Ascension
Shared: 2D Fighter · Platformer · Action

Cuphead
Shared: Difficult · Platformer · 2D

SANABI
Shared: 2D Platformer · Action · Pixel Graphics

UFO 50
Shared: Arcade · 2D · Difficult

Downwell
Shared: 2D Platformer · Platformer · Arcade

Spelunky
Shared: Platformer · Difficult · 2D

Pizza Tower
Shared: 2D Platformer · Platformer · Indie

DRAGON BALL FighterZ
Shared: 2D Fighter · PvP · Action

VVVVVV
Shared: 2D Platformer · Platformer · Difficult

Hollow Knight
Shared: Platformer · Difficult · 2D

Pepper Grinder
Shared: 2D Platformer · Difficult · Platformer

Stick Fight: The Game
Shared: PvP · 2D Fighter · Action

Blasphemous 2
Shared: Difficult · 2D Platformer · Platformer

The Messenger
Shared: Platformer · 2D Platformer · 2D

Geometry Dash
Shared: Difficult · 2D · Platformer