Games like Mission Ammunition
Games like Mission Ammunition include Broforce, Skul: The Hero Slayer, Shovel Knight: Treasure Trove, Katana ZERO, and Huntdown. We matched them by the tags players give Mission Ammunition on Steam (Action, Indie, Pixel Graphics, Platformer, and Side Scroller): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · Pixel Graphics · Platformer

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

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

Katana ZERO
Shared: Action · Pixel Graphics · Platformer

Huntdown
Shared: Pixel Graphics · Action · Side Scroller

Celeste
Shared: Pixel Graphics · Indie · Platformer

SANABI
Shared: Action · Pixel Graphics · Indie

Super Meat Boy
Shared: Indie · Platformer · Pixel Graphics

Intrusion 2
Shared: Action · Indie · Platformer

Cuphead
Shared: Platformer · Difficult · Indie

Blazing Chrome
Shared: Action · Pixel Graphics · Indie

Hollow Knight
Shared: Platformer · Indie · 2D

Blasphemous
Shared: Pixel Graphics · Indie · 2D

Bleed
Shared: Action · Indie · Platformer

Rogue Legacy
Shared: Indie · Platformer · Action

Risk of Rain (2013)
Shared: Indie · Action · Platformer

Valfaris
Shared: Action · Indie · Platformer

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

DEADBOLT
Shared: Pixel Graphics · Indie · Action

My Friend Pedro
Shared: Action · Indie · Shooter

Axiom Verge
Shared: Indie · Pixel Graphics · Action

Jump King
Shared: Indie · Pixel Graphics · Action

Duck Game
Shared: Action · Pixel Graphics · Indie

Zombotron
Shared: Action · Indie · 2D