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

Hades
Shared: Action Roguelike · Hack and Slash · Roguelite

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

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

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

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

Moonlighter
Shared: Hack and Slash · Action Roguelike · Dungeon Crawler

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

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

Dead Cells
Shared: Action Roguelike · Hack and Slash · Roguelite

Wizard of Legend
Shared: Action Roguelike · Dungeon Crawler · Roguelite

UnderMine
Shared: Action Roguelike · Roguelite · Dungeon Crawler

BlazBlue Entropy Effect
Shared: Action Roguelike · Action-Adventure · Action

Heroes of Hammerwatch
Shared: Action Roguelike · Roguelite · Dungeon Crawler

Tiny Rogues
Shared: Action Roguelike · Bullet Hell · Roguelite

Megabonk
Shared: Action Roguelike · Roguelite · Bullet Hell

Heroes of Hammerwatch II
Shared: Action Roguelike · Dungeon Crawler · Roguelite

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Dungeon Crawler · Pixel Graphics

Cinderia
Shared: Action Roguelike · Hack and Slash · Roguelite

Ember Knights
Shared: Action Roguelike · Roguelite · Hack and Slash

Shape of Dreams
Shared: Action Roguelike · Hack and Slash · Roguelite

Children of Morta
Shared: Hack and Slash · Action Roguelike · Roguelite

Dungreed
Shared: Action Roguelike · Roguelite · Dungeon Crawler

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

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