Games like Nova Survivors
Games like Nova Survivors include Vampire Survivors, Megabonk, Brotato, Deep Rock Galactic: Survivor, and Death Must Die. We matched them by the tags players give Nova Survivors on Steam (Action Roguelike, Arena Shooter, Top-Down Shooter, Bullet Hell, and Bullet Heaven): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Megabonk
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

Brotato
Shared: Action Roguelike · Bullet Hell · Roguelike

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

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

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

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

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

Nuclear Throne
Shared: Action Roguelike · Roguelike · Bullet Hell

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Nova Drift
Shared: Bullet Hell · Action Roguelike · Arena Shooter

Time Wasters
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

Nordic Ashes: Survivors of Ragnarok
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

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

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

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

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

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

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

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Roguelite

Noobs Are Coming
Shared: Action Roguelike · Arena Shooter · Bullet Hell

Karate Survivor
Shared: Action Roguelike · Bullet Heaven · Bullet Hell