Games like Machine Gun Fury
Games like Machine Gun Fury include Momodora: Reverie Under The Moonlight, Rain World, Hollow Knight, Celeste, and Huntdown. We matched them by the tags players give Machine Gun Fury on Steam (Side Scroller, Exploration, 2D Platformer, Shoot 'Em Up, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Exploration

Rain World
Shared: Exploration · Difficult · Platformer

Hollow Knight
Shared: Platformer · Difficult · Exploration

Celeste
Shared: Difficult · 2D Platformer · Platformer

Huntdown
Shared: Side Scroller · Shoot 'Em Up · Shooter

Kero Blaster
Shared: Side Scroller · Shoot 'Em Up · Platformer

Airscape - The Fall of Gravity
Shared: Exploration · Shoot 'Em Up · Difficult

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

Hollow Knight: Silksong
Shared: Difficult · Exploration · Platformer

Alex Jones: NWO Wars
Shared: 2D Platformer · Side Scroller · Shoot 'Em Up

Touhou Luna Nights
Shared: Side Scroller · Exploration · Difficult

Broforce
Shared: Side Scroller · Platformer · 2D

Geometry Dash
Shared: Difficult · 2D · Platformer

SANABI
Shared: 2D Platformer · Action · 2D

Afterimage
Shared: 2D Platformer · Side Scroller · Exploration

Bit Blaster XL
Shared: Shoot 'Em Up · Difficult · Shooter

Rise & Shine
Shared: Side Scroller · 2D Platformer · Shoot 'Em Up

Cuphead
Shared: Difficult · Platformer · 2D

Rogue Legacy 2
Shared: Platformer · Arcade · Difficult

Contra Anniversary Collection
Shared: Side Scroller · Platformer · Difficult

Downwell
Shared: 2D Platformer · Platformer · Difficult

Contra: Operation Galuga
Shared: 2D Platformer · Side Scroller · Shoot 'Em Up

METAL SLUG
Shared: Side Scroller · Shoot 'Em Up · Arcade

Spelunky 2
Shared: 2D Platformer · Platformer · Difficult