Games like Spellbook Demonslayers
Games like Spellbook Demonslayers include Halls of Torment, Vampire Survivors, Death Must Die, BALL x PIT, and Megabonk. We matched them by the tags players give Spellbook Demonslayers on Steam (Dark Fantasy, Top-Down, Pixel Graphics, Singleplayer, and Early Access): closest matches first, and among equally close ones the better-known games.

Halls of Torment
Shared: Dark Fantasy · Pixel Graphics · Action Roguelike

Vampire Survivors
Shared: Pixel Graphics · Bullet Hell · Action Roguelike

Death Must Die
Shared: Pixel Graphics · Bullet Hell · Action Roguelike

BALL x PIT
Shared: Bullet Hell · Roguelite · Action

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Brotato
Shared: Singleplayer · Bullet Hell · Action Roguelike

Nuclear Throne
Shared: Pixel Graphics · Action Roguelike · Bullet Hell

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

Noobs Want to Live
Shared: Pixel Graphics · Bullet Hell · Action Roguelike

Hades
Shared: Action Roguelike · Roguelite · Singleplayer

Boneraiser Minions
Shared: Pixel Graphics · Bullet Hell · Action Roguelike

UnderMine
Shared: Pixel Graphics · Action Roguelike · Roguelite

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

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

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

20 Minutes Till Dawn
Shared: Bullet Hell · Action Roguelike · Pixel Graphics

Sephiria
Shared: Action Roguelike · Pixel Graphics · Roguelite

Dead Cells
Shared: Pixel Graphics · Action Roguelike · Roguelike

Magicraft
Shared: Action Roguelike · Bullet Hell · Top-Down

Dungreed
Shared: Pixel Graphics · Action Roguelike · Singleplayer

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Top-Down · Bullet Hell

Tiny Rogues
Shared: Bullet Hell · Action Roguelike · Top-Down