Games like Shardstorm
Games like Shardstorm include Vampire Survivors, Halls of Torment, Death Must Die, Hades, and Megabonk. We matched them by the tags players give Shardstorm on Steam (Action Roguelike, Bullet Hell, Hack and Slash, Roguelite, and Roguelike): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Roguelite

Death Must Die
Shared: Action Roguelike · Bullet Hell · Roguelite

Hades
Shared: Action Roguelike · Hack and Slash · Roguelite

Megabonk
Shared: Action Roguelike · Roguelite · Roguelike

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

Hero Siege
Shared: Action Roguelike · Hack and Slash · RPG

Hades II
Shared: Hack and Slash · Roguelite · Roguelike

Dead Cells
Shared: Action Roguelike · Roguelike · Roguelite

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Skul: The Hero Slayer
Shared: Action Roguelike · Roguelike · Roguelite

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Roguelike

BALL x PIT
Shared: Bullet Hell · Roguelite · Action Roguelike

Magicraft
Shared: Action Roguelike · Bullet Hell · Roguelite

Nuclear Throne
Shared: Action Roguelike · Roguelike · Bullet Hell

暖雪 Warm Snow
Shared: Action Roguelike · Roguelite · Roguelike

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Bullet Hell · Roguelite

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Moonlighter
Shared: Hack and Slash · Roguelite · Action Roguelike

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Roguelite

Sephiria
Shared: Action Roguelike · Roguelite · Roguelike

Dungreed
Shared: Action Roguelike · Roguelite · Roguelike

Cultivation Story: Reincarnation
Shared: Action Roguelike · Bullet Hell · Roguelite

Asgard's Fall — Viking Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite