Games like Perish Song
Games like Perish Song include Enter the Gungeon, Vampire Survivors, Tiny Rogues, 20 Minutes Till Dawn, and Halls of Torment. We matched them by the tags players give Perish Song on Steam (Action Roguelike, Bullet Hell, Boss Rush, Shoot 'Em Up, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

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

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Tiny Rogues
Shared: Action Roguelike · Bullet Hell · Difficult

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

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

Star of Providence
Shared: Bullet Hell · Action Roguelike · Shoot 'Em Up

Black Myth: Wukong
Shared: Souls-like · Action-Adventure · Action RPG

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

Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Action Roguelike

Realm of the Mad God Exalt
Shared: Bullet Hell · Action Roguelike · Difficult

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Difficult · Dungeon Crawler

Dead Cells
Shared: Action Roguelike · Souls-like · Roguelite

BALL x PIT
Shared: Bullet Hell · Action Roguelike · Shoot 'Em Up

Hades
Shared: Action Roguelike · Roguelite · Dungeon Crawler

SULFUR
Shared: Action Roguelike · Dungeon Crawler · Difficult

The Void Rains Upon Her Heart
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

Dungreed
Shared: Action Roguelike · Roguelite · Dungeon Crawler

I Am Legion: Stand Survivors
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

Hades II
Shared: Action Roguelike · Roguelite · Action

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

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Difficult

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Noita
Shared: Difficult · Dungeon Crawler · Action Roguelike

暖雪 Warm Snow
Shared: Action Roguelike · Action-Adventure · Roguelite