Games like Run or Rot: ZK1L4
Games like Run or Rot: ZK1L4 include Vampire Survivors, BALL x PIT, Nuclear Throne, Enter the Gungeon, and Halls of Torment. We matched them by the tags players give Run or Rot: ZK1L4 on Steam (Action Roguelike, Bullet Hell, Action, Top-Down Shooter, and Roguelite): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

BALL x PIT
Shared: Action · Bullet Hell · Roguelite

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelike

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

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

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

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

Hades
Shared: Action Roguelike · Roguelite · Action

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Roguelite

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Hell · Roguelite

Dungreed
Shared: Action Roguelike · Action · Roguelite

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

Blazing Beaks
Shared: Action Roguelike · Roguelike · Top-Down Shooter

Dead Cells
Shared: Action Roguelike · Roguelike · Roguelite

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Apocalypse Party
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

Star of Providence
Shared: Bullet Hell · Action Roguelike · Roguelite