Games like Slay The Zone
Games like Slay The Zone include Vampire Survivors, BALL x PIT, Halls of Torment, Nova Drift, and Brotato. We matched them by the tags players give Slay The Zone on Steam (Action Roguelike, Bullet Hell, Arcade, RPG, and Roguelike Deckbuilder): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

Nova Drift
Shared: Bullet Hell · Action Roguelike · Arcade

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

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

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Action RPG

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

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

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

SNKRX
Shared: Action Roguelike · Shoot 'Em Up · Arcade

FatalZone
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

Hero Siege
Shared: Action Roguelike · Action RPG · RPG

Slime 3K: Rise Against Despot
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

Hades II
Shared: Action Roguelike · RPG · Roguelite

Goobies
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Seraph's Last Stand
Shared: Action Roguelike · Bullet Hell · Roguelike Deckbuilder

Pesticide Not Required
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

Magicraft
Shared: Action Roguelike · Bullet Hell · RPG

Time Wasters
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up