Games like Technoidium
Games like Technoidium include BALL x PIT, Deep Rock Galactic: Survivor, 20 Minutes Till Dawn, Vampire Survivors, and Hades. We matched them by the tags players give Technoidium on Steam (Top-Down Shooter, Action, Roguelite, Bullet Hell, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.

BALL x PIT
Shared: Action · Roguelite · Bullet Hell

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

20 Minutes Till Dawn
Shared: Bullet Hell · Roguelite · Top-Down Shooter

Vampire Survivors
Shared: Roguelite · Bullet Hell · Action

Hades
Shared: Roguelite · Action · Hack and Slash

Brotato
Shared: Bullet Hell · Roguelite · Singleplayer

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Roguelite · Action

Halls of Torment
Shared: Roguelite · Bullet Hell · Action

Furi
Shared: Bullet Hell · Shoot 'Em Up · Hack and Slash

Megabonk
Shared: Roguelite · Bullet Hell · Action

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

Greedland
Shared: Roguelite · Shoot 'Em Up · Bullet Hell

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

Nuclear Throne
Shared: Action · Bullet Hell · Top-Down Shooter

Tiny Rogues
Shared: Top-Down Shooter · Bullet Hell · Roguelite

Hades II
Shared: Action · Roguelite · Hack and Slash

Death Must Die
Shared: Roguelite · Bullet Hell · Action

Apocalypse Party
Shared: Top-Down Shooter · Bullet Hell · Roguelite

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

Soulstone Survivors
Shared: Roguelite · Bullet Hell · Action

Sky Force Reloaded
Shared: Top-Down Shooter · Shoot 'Em Up · Bullet Hell

Goobies
Shared: Top-Down Shooter · Roguelite · Bullet Hell

Skul: The Hero Slayer
Shared: Action · Roguelite · Indie

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