Games like METAL SLUG
Games like METAL SLUG include Broforce, METAL SLUG 3, METAL SLUG X, METAL SLUG 2, and Sonic Mania. We matched them by the tags players give METAL SLUG on Steam (Action, Arcade, 2D, Side Scroller, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · 2D · Co-op

METAL SLUG 3
Shared: Arcade · Action · Side Scroller

METAL SLUG X
Shared: Action · Arcade · 2D

METAL SLUG 2
Shared: Action · Arcade · 2D

Sonic Mania
Shared: 2D · Retro · Action

Duck Game
Shared: Action · Multiplayer · 2D

Streets of Rage 4
Shared: Action · 2D · Arcade

Huntdown
Shared: Action · Side Scroller · 2D

Guns, Gore and Cannoli 2
Shared: Action · Side Scroller · 2D

Cuphead
Shared: 2D · Co-op · Multiplayer

METAL SLUG XX
Shared: Action · 2D · Arcade

Contra Anniversary Collection
Shared: Action · Side Scroller · 2D

Guns, Gore & Cannoli
Shared: Action · 2D · Side Scroller

BattleBlock Theater®
Shared: Co-op · Multiplayer · 2D

Castle Crashers®
Shared: 2D · Co-op · Action

Blazing Chrome
Shared: Action · Side Scroller · Retro

Move or Die
Shared: Action · Multiplayer · 2D

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Multiplayer · Side Scroller · 2D

Shovel Knight: Treasure Trove
Shared: 2D · Action · Retro

Stick Fight: The Game
Shared: Action · Multiplayer · 2D

Grand Theft Auto V Legacy
Shared: Action · Multiplayer · Shooter

THE KING OF FIGHTERS 2002 UNLIMITED MATCH
Shared: Action · Arcade · Multiplayer

Counter-Strike 2
Shared: Action · Multiplayer · Shooter

Capcom Beat 'Em Up Bundle
Shared: Arcade · Action · Retro