Games like Spell Defender
Games like Spell Defender include Megabonk, Vampire Survivors, BALL x PIT, Halls of Torment, and Brotato. We matched them by the tags players give Spell Defender on Steam (Action Roguelike, Roguelite, Roguelike, Action, and Survival): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Roguelike · Roguelite

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

BALL x PIT
Shared: Roguelite · Action · Action Roguelike

Halls of Torment
Shared: Action Roguelike · Roguelite · Roguelike

Brotato
Shared: Roguelike · Action Roguelike · Bullet Hell

Hades
Shared: Action Roguelike · Roguelite · Action

Risk of Rain 2
Shared: Action Roguelike · Roguelike · Roguelite

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

20 Minutes Till Dawn
Shared: Action Roguelike · Roguelite · Survival

Atomicrops
Shared: Roguelike · Action · Action Roguelike

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Roguelike

Hades II
Shared: Roguelite · Roguelike · Action

The Spell Brigade
Shared: Roguelite · Action Roguelike · Roguelike

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

Nuclear Throne
Shared: Action Roguelike · Roguelike · Roguelite

Sephiria
Shared: Action Roguelike · Roguelite · Roguelike

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

Nova Drift
Shared: Roguelite · Action Roguelike · Arcade

Rogue Legacy
Shared: Roguelike · Action Roguelike · Action

Magicraft
Shared: Action Roguelike · Roguelite · Roguelike

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

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

Wizard of Legend
Shared: Action Roguelike · Roguelike · Action

Dungreed
Shared: Action Roguelike · Roguelike · Roguelite