Games like Hullstorm
Games like Hullstorm include Megabonk, Skul: The Hero Slayer, Vampire Survivors, Deep Rock Galactic: Survivor, and Tower of Babel: Survivors of Chaos. We matched them by the tags players give Hullstorm on Steam (Action, Action Roguelike, Bullet Heaven, 2D, and Space): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Bullet Heaven · Action

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

Vampire Survivors
Shared: Action Roguelike · 2D · Singleplayer

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Heaven · Action

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

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

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

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

BALL x PIT
Shared: Action · Action Roguelike · 2D

Risk of Rain Returns
Shared: Action Roguelike · 2D · Action

Brotato
Shared: Action Roguelike · Bullet Heaven · Singleplayer

STAR WARS™ Battlefront™ II
Shared: Action · Space · Singleplayer

Antivirus Survivors 2003 Professional
Shared: Action Roguelike · Bullet Heaven · Action

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Action

Spirit Hunters: Infinite Horde
Shared: Action Roguelike · Bullet Heaven · Action

Hades
Shared: Action Roguelike · Action · Singleplayer

STAR WARS Jedi: Survivor™
Shared: Action · Singleplayer · Space

Boneraiser Minions
Shared: Action Roguelike · 2D · Bullet Heaven

Dome Keeper
Shared: Action · Singleplayer · Combat

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

Rogue Legacy
Shared: Action Roguelike · Action · 2D

Black Myth: Wukong
Shared: Action · Combat · Singleplayer

God of War
Shared: Action · Singleplayer · Combat