Games like GIGANTIC ARMY
Games like GIGANTIC ARMY include Broforce, Huntdown, Shovel Knight: Treasure Trove, SANABI, and Katana ZERO. We matched them by the tags players give GIGANTIC ARMY on Steam (Runner, Action, Indie, Mechs, and Platformer): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · Platformer · Indie

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

Shovel Knight: Treasure Trove
Shared: Platformer · Indie · Action

SANABI
Shared: Action · Indie · 2D Platformer

Katana ZERO
Shared: Action · Platformer · Indie

Skul: The Hero Slayer
Shared: Action · Indie · Platformer

Blazing Chrome
Shared: Action · Indie · Side Scroller

Gravity Circuit
Shared: Action · Indie · Platformer

Intrusion 2
Shared: Action · Indie · Platformer

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

Downwell
Shared: Indie · Platformer · Action

UFO 50
Shared: Indie · Action · Arcade

Rogue Legacy 2
Shared: Action · Arcade · Indie

METAL SLUG
Shared: Action · Arcade · Side Scroller

Celeste
Shared: Indie · Platformer · 2D Platformer

The Messenger
Shared: Platformer · Indie · Action

NINJA GAIDEN: Ragebound
Shared: Action · Platformer · Indie

Bloodstained: Curse of the Moon
Shared: Action · Platformer · Side Scroller

Pizza Tower
Shared: Indie · 2D Platformer · Platformer

METAL SLUG 3
Shared: Action · Arcade · Side Scroller

Dino Run DX
Shared: Indie · Action · Runner

Rogue Legacy
Shared: Indie · Platformer · Action

Guns of Fury
Shared: Platformer · Indie · Shoot 'Em Up

LUFTRAUSERS
Shared: Indie · Action · Arcade