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

Megabonk
Shared: Action Roguelike · Bullet Heaven · Roguelite

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

Brotato
Shared: Action Roguelike · Bullet Hell · Bullet Heaven

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

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

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

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

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

Nordic Ashes: Survivors of Ragnarok
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

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

Arms of God
Shared: Action Roguelike · Bullet Heaven · Top-Down Shooter

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

Nova Drift
Shared: Bullet Hell · Action Roguelike · Roguelite

NIMRODS
Shared: Bullet Heaven · Action Roguelike · Top-Down Shooter

Vital Shell
Shared: Action Roguelike · Bullet Heaven · Roguelite

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelike

Crab Champions
Shared: Action Roguelike · Arcade · Roguelike

Astro Prospector
Shared: Action Roguelike · Roguelite · Bullet Heaven

Goobies
Shared: Action Roguelike · Top-Down Shooter · Bullet Hell

Be My Horde
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

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