Games like Mind Keeper
Games like Mind Keeper include Vampire Survivors, BALL x PIT, Nova Drift, Halls of Torment, and Megabonk. We matched them by the tags players give Mind Keeper on Steam (Tower Defense, Shoot 'Em Up, Roguelike, Bullet Hell, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Roguelite · Roguelike

BALL x PIT
Shared: Bullet Hell · Roguelike · Shoot 'Em Up

Nova Drift
Shared: Shoot 'Em Up · Bullet Hell · Roguelite

Halls of Torment
Shared: Bullet Hell · Roguelike · Roguelite

Megabonk
Shared: Roguelike · Bullet Hell · Roguelite

Death Must Die
Shared: Bullet Hell · Roguelite · Roguelike

Brotato
Shared: Roguelike · Bullet Hell · Roguelite

Utopia Must Fall
Shared: Tower Defense · Bullet Hell · Roguelite

Star of Providence
Shared: Shoot 'Em Up · Bullet Hell · Roguelite

Necrosmith
Shared: Tower Defense · Bullet Hell · Roguelite

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

I Am Legion: Stand Survivors
Shared: Shoot 'Em Up · Bullet Hell · Roguelite

Soulstone Survivors
Shared: Bullet Hell · Roguelike · Roguelite

Enter the Gungeon
Shared: Bullet Hell · Roguelike · Indie

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

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

Magicraft
Shared: Bullet Hell · Roguelike · Roguelite

Nordic Ashes: Survivors of Ragnarok
Shared: Bullet Hell · Roguelike · Roguelite

Boneraiser Minions
Shared: Bullet Hell · Roguelite · 2D

Downwell
Shared: Precision Platformer · 2D Platformer · Indie

Hades
Shared: Roguelite · Roguelike · Indie

Voidigo
Shared: Roguelike · Shoot 'Em Up · Bullet Hell

SHOOPER NOVA
Shared: Bullet Hell · Tower Defense · Roguelite

The Void Rains Upon Her Heart
Shared: Bullet Hell · Shoot 'Em Up · Roguelite