Games like Idle Maku
Games like Idle Maku include BALL x PIT, Vampire Survivors, 20 Minutes Till Dawn, Megabonk, and Brotato. We matched them by the tags players give Idle Maku on Steam (Action, Bullet Hell, Survival, Survival Horror, and Anime): closest matches first, and among equally close ones the better-known games.

BALL x PIT
Shared: Action · Bullet Hell · Arcade

Vampire Survivors
Shared: Bullet Hell · Action Roguelike · Action

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

Megabonk
Shared: Bullet Hell · Action Roguelike · Action

Brotato
Shared: Bullet Hell · Action Roguelike · Survival

Nuclear Throne
Shared: Bullet Hell · Action · Action Roguelike

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

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

Nova Drift
Shared: Bullet Hell · Action Roguelike · Arcade

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

PUBG: BATTLEGROUNDS
Shared: Survival · Action · Shooter

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

FatalZone
Shared: Bullet Hell · Survival · Action Roguelike

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

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

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

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

Atomicrops
Shared: Action · Bullet Hell · Action Roguelike

Realm of the Mad God Exalt
Shared: Bullet Hell · Roguelike · Action Roguelike

Escape From Duckov
Shared: Action · Top-Down Shooter · Survival

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

Rocket Rats
Shared: Bullet Hell · Action Roguelike · Action

I Am Legion: Stand Survivors
Shared: Bullet Hell · Action Roguelike · Action

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