Games like Gung Beetle
Games like Gung Beetle include Megabonk, Deep Rock Galactic: Survivor, Brotato, NIMRODS, and Soulstone Survivors. We matched them by the tags players give Gung Beetle on Steam (Action Roguelike, Twin Stick Shooter, Bullet Heaven, Roguelike, and Gun Customization): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Bullet Heaven · Roguelike

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Heaven · Top-Down Shooter

Brotato
Shared: Action Roguelike · Roguelike · Bullet Heaven

NIMRODS
Shared: Action Roguelike · Bullet Heaven · Gun Customization

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Roguelike

Yet Another Zombie Survivors
Shared: Action Roguelike · Bullet Heaven · Top-Down Shooter

Rogue: Genesia
Shared: Action Roguelike · Bullet Heaven · Twin Stick Shooter

Enter the Gungeon
Shared: Action Roguelike · Roguelike · Twin Stick Shooter

Vampire Survivors
Shared: Action Roguelike · Roguelike · Bullet Hell

20 Minutes Till Dawn
Shared: Action Roguelike · Top-Down Shooter · Combat

BALL x PIT
Shared: Action Roguelike · Roguelike · Action

SYNTHETIK 2
Shared: Action Roguelike · Twin Stick Shooter · Top-Down Shooter

Nuclear Throne
Shared: Action Roguelike · Roguelike · Top-Down Shooter

Arms of God
Shared: Action Roguelike · Bullet Heaven · Top-Down Shooter

Atomicrops
Shared: Roguelike · Action Roguelike · Action

Galactic Glitch
Shared: Action Roguelike · Twin Stick Shooter · Roguelike

Time Wasters
Shared: Action Roguelike · Bullet Heaven · Twin Stick Shooter

The Spell Brigade
Shared: Bullet Heaven · Action Roguelike · Roguelike

Death Must Die
Shared: Action Roguelike · Bullet Heaven · Roguelike

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Bullet Heaven · Roguelike

SYNTHETIK: Legion Rising
Shared: Action Roguelike · Top-Down Shooter · Twin Stick Shooter

Halls of Torment
Shared: Action Roguelike · Roguelike · Bullet Heaven

The Binding of Isaac
Shared: Action Roguelike · Roguelike · Action

Pathogenic
Shared: Roguelike · Action Roguelike · Bullet Heaven