Games like GUN&DUN
Games like GUN&DUN include Vampire Survivors, LUFTRAUSERS, BALL x PIT, Planes, Bullets and Vodka, and Exit the Gungeon. We matched them by the tags players give GUN&DUN on Steam (Action, Arcade, Shooter, 2D, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: 2D · Bullet Hell · Arcade

LUFTRAUSERS
Shared: Arcade · Action · 2D

BALL x PIT
Shared: Action · Arcade · Top-Down Shooter

Planes, Bullets and Vodka
Shared: Action · Arcade · Shooter

Exit the Gungeon
Shared: Arcade · Action · 2D

Bit Blaster XL
Shared: Shooter · Arcade · Action

Broforce
Shared: Action · 2D · Shooter

ZeroRanger
Shared: Action · Arcade · 2D

DRAINUS
Shared: Action · Shooter · 2D

UBERMOSH Vol.5
Shared: Action · Arcade · Indie

Nova Drift
Shared: Arcade · Bullet Hell · Shooter

DoDonPachi Resurrection
Shared: Top-Down Shooter · Shooter · Arcade

METAL SLUG
Shared: Action · Arcade · 2D

12 is Better Than 6
Shared: Action · Shooter · Top-Down Shooter

Sky Force Reloaded
Shared: Arcade · Action · Top-Down Shooter

Hotline Miami 2: Wrong Number
Shared: Action · Pixel Graphics · Top-Down Shooter

Cyberhunt
Shared: Action · Arcade · 2D

Huntdown
Shared: Action · Shooter · 2D

Hotline Miami
Shared: Action · Pixel Graphics · Indie

Revolution Ace
Shared: Action · Shooter · Arcade

METAL SLUG X
Shared: Action · Arcade · 2D

Megabonk
Shared: Action · Bullet Hell · Arcade

A Dance of Fire and Ice
Shared: Arcade · 2D · Singleplayer

Blazing Chrome
Shared: Action · Arcade · 2D