Games like Metal Ascension
Games like Metal Ascension include Megabonk, Deep Rock Galactic: Survivor, Brotato, Soulstone Survivors, and Rogue: Genesia. We matched them by the tags players give Metal Ascension on Steam (Bullet Heaven, Action Roguelike, Bullet Hell, Roguelite, and PvE): 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

Brotato
Shared: Bullet Hell · Action Roguelike · Bullet Heaven

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

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

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

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

The Spell Brigade
Shared: Bullet Heaven · Bullet Hell · Roguelite

Nomad Survival
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Vital Shell
Shared: Action Roguelike · Bullet Heaven · Roguelite

Hades
Shared: Action Roguelike · Roguelite · Roguelike

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

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

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

Nova Drift
Shared: Bullet Hell · Roguelite · Action Roguelike

TerraTech Legion
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

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

Conquest Dark
Shared: Bullet Heaven · Action Roguelike · Roguelite

Hades II
Shared: Roguelite · Action Roguelike · Roguelike

Project Lazarus
Shared: Action Roguelike · Bullet Hell · Bullet Heaven

Atomicrops
Shared: Bullet Hell · Action Roguelike · Roguelike