Games like Let Them Come: Onslaught
Games like Let Them Come: Onslaught include Megabonk, Deep Rock Galactic: Survivor, Vampire Survivors, Brotato, and Soulstone Survivors. We matched them by the tags players give Let Them Come: Onslaught on Steam (Bullet Heaven, Action Roguelike, Roguelite, Action, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Bullet Heaven · Action Roguelike · Roguelite

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

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

Brotato
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

Soulstone Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

BALL x PIT
Shared: Roguelite · Action · Action Roguelike

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

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

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

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

Yet Another Zombie Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

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

Nova Drift
Shared: Roguelite · Action Roguelike · Bullet Hell

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

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Bullet Hell

Hades
Shared: Action Roguelike · Roguelite · Action

Arms of God
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

Astro Prospector
Shared: Roguelite · Action Roguelike · Bullet Heaven

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

Project Lazarus
Shared: Action Roguelike · Action · Bullet Heaven

Jotunnslayer: Hordes of Hel
Shared: Bullet Heaven · Action Roguelike · Roguelite

Time Wasters
Shared: Bullet Heaven · Action Roguelike · Roguelite

Vital Shell
Shared: Action Roguelike · Bullet Heaven · Roguelite

Hades II
Shared: Action · Roguelite · Action Roguelike