Games like Muspell
Games like Muspell include Vampire Survivors, Hero Siege, Halls of Torment, Death Must Die, and Megabonk. We matched them by the tags players give Muspell on Steam (Casual, Action Roguelike, Roguelite, Pixel Graphics, and Arcade): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Roguelite · Pixel Graphics

Hero Siege
Shared: Action Roguelike · Pixel Graphics · Top-Down

Halls of Torment
Shared: Action Roguelike · Roguelite · Pixel Graphics

Death Must Die
Shared: Action Roguelike · Roguelite · Pixel Graphics

Megabonk
Shared: Action Roguelike · Roguelite · Pixel Graphics

Sephiria
Shared: Action Roguelike · Roguelite · Pixel Graphics

Hades
Shared: Action Roguelike · Roguelite · Indie

Streets of Rogue
Shared: Action Roguelike · Roguelite · Pixel Graphics

Heroes of Hammerwatch
Shared: Action Roguelike · Roguelite · Pixel Graphics

UnderMine
Shared: Action Roguelike · Roguelite · Pixel Graphics

Children of Morta
Shared: Pixel Graphics · Action Roguelike · Roguelite

Brotato
Shared: Action Roguelike · Roguelite · Singleplayer

Shape of Dreams
Shared: Action Roguelike · Roguelite · Co-op

Moonlighter
Shared: Roguelite · Pixel Graphics · Action Roguelike

Ember Knights
Shared: Action Roguelike · Roguelite · Pixel Graphics

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

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Pixel Graphics

Wizard of Legend
Shared: Action Roguelike · Pixel Graphics · Roguelite

BALL x PIT
Shared: Roguelite · Arcade · Action Roguelike

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

Enter the Gungeon
Shared: Action Roguelike · Pixel Graphics · Indie

Yet Another Zombie Survivors
Shared: Action Roguelike · Roguelite · Arcade

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Arcade

Crawl
Shared: Pixel Graphics · Action Roguelike · 4 Player Local