Games like Galandrix
Games like Galandrix include Vampire Survivors, Megabonk, BALL x PIT, Enter the Gungeon, and Halls of Torment. We matched them by the tags players give Galandrix on Steam (Top-Down, Bullet Hell, Action Roguelike, Real Time Tactics, and Strategy): closest matches first, and among equally close ones the better-known games.

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

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelike

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

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

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

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

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

FTL: Faster Than Light
Shared: Strategy · Roguelike · Space

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

Nordic Ashes: Survivors of Ragnarok
Shared: Action Roguelike · Bullet Hell · Top-Down

The Binding of Isaac
Shared: Action Roguelike · Roguelike · Top-Down

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

Nova Drift
Shared: Bullet Hell · Action Roguelike · Arcade

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

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelike

Aliens: Dark Descent
Shared: Strategy · Real Time Tactics · Top-Down

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

Heat Signature
Shared: Top-Down · Strategy · Roguelike

SHOOPER NOVA
Shared: Bullet Hell · Strategy · Action Roguelike

Cursorblade
Shared: Action Roguelike · Bullet Hell · Arcade

Necrosmith
Shared: Action Roguelike · Bullet Hell · Top-Down

Noobs Want to Live
Shared: Bullet Hell · Action Roguelike · Roguelike

Astro Prospector
Shared: Action Roguelike · Bullet Hell · Roguelike

Magicraft
Shared: Action Roguelike · Bullet Hell · Top-Down