Games like Chumini: Tiny Army
Games like Chumini: Tiny Army include Vampire Survivors, Megabonk, Death Must Die, Brotato, and Halls of Torment. We matched them by the tags players give Chumini: Tiny Army on Steam (Bullet Heaven, Bullet Hell, Action Roguelike, Cute, and 2D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Action Roguelike · 2D

Megabonk
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

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

Brotato
Shared: Bullet Hell · Action Roguelike · Bullet Heaven

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

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

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

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

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

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

Boneraiser Minions
Shared: Bullet Hell · Action Roguelike · Bullet Heaven

Skul: The Hero Slayer
Shared: Action Roguelike · Indie · 2D

Cursorblade
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

The Spell Brigade
Shared: Bullet Heaven · Bullet Hell · Action Roguelike

Rabbit and Steel
Shared: Bullet Hell · Action Roguelike · Cute

Rogue: Genesia
Shared: Bullet Heaven · Bullet Hell · Action Roguelike

Nova Drift
Shared: Bullet Hell · Action Roguelike · Bullet Heaven

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelike

Hades
Shared: Action Roguelike · Indie · Roguelite

Atomicrops
Shared: Bullet Hell · Roguelike · Action Roguelike

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

Astro Prospector
Shared: Action Roguelike · Bullet Hell · Roguelike

Yet Another Zombie Survivors
Shared: Bullet Heaven · Action Roguelike · Indie

Be My Horde
Shared: Bullet Heaven · Action Roguelike · Bullet Hell