Games like Nuclear Gladiators 3000
Games like Nuclear Gladiators 3000 include Vampire Survivors, Megabonk, Deep Rock Galactic: Survivor, Nova Drift, and BALL x PIT. We matched them by the tags players give Nuclear Gladiators 3000 on Steam (Action Roguelike, Arena Shooter, Bullet Heaven, Bullet Hell, and Roguelite): 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 · Roguelite

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

Nova Drift
Shared: Bullet Hell · Action Roguelike · Roguelite

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

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

Brotato
Shared: Action Roguelike · Bullet Hell · Bullet Heaven

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

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

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Rogue: Genesia
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

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

Yet Another Zombie Survivors
Shared: Action Roguelike · Bullet Heaven · Roguelite

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

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

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

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

Arms of God
Shared: Action Roguelike · Bullet Heaven · Arena Shooter

Vital Shell
Shared: Action Roguelike · Bullet Heaven · Roguelite

Glyphica: Typing Survival
Shared: Action Roguelike · Arena Shooter · Bullet Hell

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

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

Cursorblade
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

Funguys Swarm
Shared: Action Roguelike · Bullet Heaven · Bullet Hell