Games like Gunpowder Massacre
Games like Gunpowder Massacre include Broforce, My Friend Pedro, Hotline Miami 2: Wrong Number, Hotline Miami, and DEADBOLT. We matched them by the tags players give Gunpowder Massacre on Steam (Side Scroller, Action, PvE, Shooter, and Arcade): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · 2D · Pixel Graphics

My Friend Pedro
Shared: Action · Shooter · Gore

Hotline Miami 2: Wrong Number
Shared: Action · Gore · Violent

Hotline Miami
Shared: Action · Violent · Gore

DEADBOLT
Shared: Action · Pixel Graphics · 2D

Blasphemous
Shared: Gore · Pixel Graphics · 2D

Huntdown
Shared: Side Scroller · Action · Shooter

HELLDIVERS™ 2
Shared: PvE · Action · Shooter

DOOM Eternal
Shared: Action · Gore · Shooter

CARRION
Shared: Action · Gore · Pixel Graphics

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

People Playground
Shared: Gore · Violent · 2D

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

12 is Better Than 6
Shared: Action · Shooter · Gore

BUTCHER
Shared: Action · Gore · 2D

DOOM
Shared: Action · Shooter · Gore

METAL SLUG
Shared: Action · Side Scroller · Arcade

Mark of the Ninja: Remastered
Shared: Action · Side Scroller · 2D

Skul: The Hero Slayer
Shared: Action · 2D · Pixel Graphics

Valfaris
Shared: Action · Gore · Side Scroller

METAL SLUG 3
Shared: Action · Side Scroller · Arcade

Wolfenstein II: The New Colossus
Shared: Action · Gore · Shooter

The Darkness II
Shared: Action · Shooter · Gore

Call of Duty®
Shared: Shooter · Action · Violent