Games like Nova Strike
Games like Nova Strike include Vampire Survivors, BALL x PIT, Nova Drift, Bit Blaster XL, and Brotato. We matched them by the tags players give Nova Strike on Steam (Action, Bullet Hell, Singleplayer, 2D, and Arcade): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Action Roguelike · 2D

BALL x PIT
Shared: Action · Bullet Hell · Arcade

Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Arcade

Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Action

Brotato
Shared: Bullet Hell · Singleplayer · Action Roguelike

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

Planes, Bullets and Vodka
Shared: Action · Bullet Hell · Shoot 'Em Up

LUFTRAUSERS
Shared: Bullet Hell · Action · Arcade

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

Megabonk
Shared: Bullet Hell · Action Roguelike · Action

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

Nuclear Throne
Shared: Bullet Hell · Action · Action Roguelike

Star Saviors
Shared: Bullet Hell · Action · Shoot 'Em Up

Sky Force Reloaded
Shared: Bullet Hell · Arcade · Action

ZeroRanger
Shared: Bullet Hell · Action · Shoot 'Em Up

Star of Providence
Shared: Bullet Hell · Action · Shoot 'Em Up

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

Ikaruga
Shared: Bullet Hell · Action · Arcade

DRAINUS
Shared: Action · Singleplayer · Shoot 'Em Up

Revolution Ace
Shared: Action · Bullet Hell · Shoot 'Em Up

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

Exit the Gungeon
Shared: Action · Arcade · Bullet Hell

Rocket Rats
Shared: Bullet Hell · Action · Action Roguelike

20 Minutes Till Dawn
Shared: Bullet Hell · Action Roguelike · Shoot 'Em Up