Games like Necromancer's Revenge
Games like Necromancer's Revenge include Vampire Survivors, Halls of Torment, Death Must Die, Soulstone Survivors, and Hades. We matched them by the tags players give Necromancer's Revenge on Steam (Action Roguelike, 2D Platformer, Hack and Slash, Bullet Hell, and Top-Down Shooter): 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

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Hades
Shared: Action Roguelike · Hack and Slash · Roguelite

Slime 3K: Rise Against Despot
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Hades II
Shared: Hack and Slash · Action Roguelike · Roguelite

Brotato
Shared: Action Roguelike · Bullet Hell · Roguelike

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

Army of Ruin
Shared: Action Roguelike · Bullet Hell · Hack and Slash

Nova Drift
Shared: Bullet Hell · Action Roguelike · Roguelite

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

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

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

Anomaly Agent
Shared: 2D Platformer · Action Roguelike · Hack and Slash

SNKRX
Shared: Action Roguelike · Roguelite · Top-Down Shooter

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

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

Larva Mortus
Shared: Action Roguelike · Hack and Slash · Bullet Hell