Games like Moonbringer
Games like Moonbringer include BALL x PIT, Megabonk, Deep Rock Galactic: Survivor, Nova Drift, and Yet Another Zombie Survivors. We matched them by the tags players give Moonbringer on Steam (Roguelite, Bullet Heaven, Shoot 'Em Up, Action, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

BALL x PIT
Shared: Roguelite · Action · Shoot 'Em Up

Megabonk
Shared: Bullet Heaven · Roguelite · Action Roguelike

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

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

Yet Another Zombie Survivors
Shared: Bullet Heaven · Roguelite · Top-Down Shooter

Brotato
Shared: Bullet Heaven · Roguelike · Action Roguelike

Halls of Torment
Shared: Roguelite · Action Roguelike · Action

Vampire Survivors
Shared: Roguelite · Action Roguelike · Roguelike

Hades
Shared: Roguelite · Action Roguelike · Action

Soulstone Survivors
Shared: Bullet Heaven · Roguelite · Action Roguelike

20 Minutes Till Dawn
Shared: Roguelite · Action Roguelike · Shoot 'Em Up

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

Hades II
Shared: Roguelite · Action · Roguelike

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

Nuclear Throne
Shared: Action Roguelike · Roguelike · Roguelite

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

Run Build Pew!
Shared: Roguelite · Bullet Heaven · Top-Down Shooter

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

R.I.P. - Reincarnation Insurance Program
Shared: Bullet Heaven · Roguelite · Action Roguelike

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

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

Spell Disk
Shared: Roguelite · Shoot 'Em Up · Action Roguelike

Void Scrappers
Shared: Bullet Heaven · Shoot 'Em Up · Roguelite

EVERSPACE™
Shared: Action · Action Roguelike · Roguelite