Games like Plumber Survivors
Games like Plumber Survivors include Vampire Survivors, Megabonk, Death Must Die, Soulstone Survivors, and Hades. We matched them by the tags players give Plumber Survivors on Steam (Action Roguelike, Bullet Hell, Casual, Hack and Slash, and Roguelite): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Hades
Shared: Action Roguelike · Hack and Slash · Roguelite

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

Hades II
Shared: Action Roguelike · Hack and Slash · Roguelite

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelite

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

Goobies
Shared: Action Roguelike · Bullet Hell · Roguelite

Jotunnslayer: Hordes of Hel
Shared: Action Roguelike · Hack and Slash · Roguelite

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

Hero Siege
Shared: Action Roguelike · Hack and Slash · Action RPG

Nova Drift
Shared: Bullet Hell · Action Roguelike · Roguelite

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Bullet Hell · Roguelite

God Of Weapons
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Twilight Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Wolcen: Lords of Mayhem
Shared: Hack and Slash · Action RPG · Isometric

Army of Ruin
Shared: Action Roguelike · Bullet Hell · Hack and Slash

Beautiful Mystic Survivors
Shared: Action Roguelike · Bullet Hell · Casual

Monsters are Coming!
Shared: Bullet Hell · Roguelite · Action Roguelike

Last Epoch
Shared: Hack and Slash · Action RPG · Isometric