Games like Penguin with a Pumpgun
Games like Penguin with a Pumpgun include Skul: The Hero Slayer, Vampire Survivors, Cult of the Lamb, BlazBlue Entropy Effect, and The Binding of Isaac: Rebirth. We matched them by the tags players give Penguin with a Pumpgun on Steam (Action, Action Roguelike, 2D, Cute, and Dark Humor): closest matches first, and among equally close ones the better-known games.

Skul: The Hero Slayer
Shared: Action · Action Roguelike · 2D

Vampire Survivors
Shared: Action Roguelike · 2D · Pixel Graphics

Cult of the Lamb
Shared: Action Roguelike · Cute · Dark Humor

BlazBlue Entropy Effect
Shared: Action Roguelike · Action · 2D

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Pixel Graphics · Indie

Dungreed
Shared: Action Roguelike · Action · Pixel Graphics

Sephiria
Shared: Action Roguelike · Action · Pixel Graphics

Rogue Legacy
Shared: Action Roguelike · Action · 2D

Risk of Rain (2013)
Shared: Action Roguelike · Action · Pixel Graphics

Enter the Gungeon
Shared: Action Roguelike · Pixel Graphics · 2D

Have a Nice Death
Shared: Action Roguelike · 2D · Action

Dead Cells
Shared: Action Roguelike · 2D · Pixel Graphics

Broforce
Shared: Action · 2D · Pixel Graphics

Shovel Knight: Treasure Trove
Shared: 2D · Pixel Graphics · Action

SANABI
Shared: Action · Pixel Graphics · 2D

Death Road to Canada
Shared: Action Roguelike · Action · Pixel Graphics

UnderMine
Shared: Action Roguelike · Action · Pixel Graphics

Megabonk
Shared: Action Roguelike · Action · Indie

Rocket Rats
Shared: Action Roguelike · 2D · Pixel Graphics

Gato Roboto
Shared: Action · 2D · Pixel Graphics

Sonic Mania
Shared: 2D · Action · Pixel Graphics

Hades
Shared: Action Roguelike · Action · Indie

Noita
Shared: Pixel Graphics · 2D · Action Roguelike

Talented
Shared: Action Roguelike · Pixel Graphics · 2D