Games like Denrei Survivors
Games like Denrei Survivors include Vampire Survivors, Megabonk, Halls of Torment, Death Must Die, and BALL x PIT. We matched them by the tags players give Denrei Survivors on Steam (Action Roguelike, Bullet Hell, Arcade, Casual, and Roguelite): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

BALL x PIT
Shared: Arcade · Bullet Hell · Roguelite

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

Hades
Shared: Action Roguelike · Roguelite · Hack and Slash

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

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

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Dead Cells
Shared: Action Roguelike · Roguelike · Roguelite

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelike

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Nova Drift
Shared: Bullet Hell · Action Roguelike · Arcade

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Casual

Hades II
Shared: Action Roguelike · Roguelite · Roguelike

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · Pixel Graphics

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

Asgard's Fall — Viking Survivors
Shared: Action Roguelike · Bullet Hell · Casual

Noobs Want to Live
Shared: Bullet Hell · Action Roguelike · Roguelike

Seraph's Last Stand
Shared: Action Roguelike · Bullet Hell · Casual

Hero Siege
Shared: Action Roguelike · Hack and Slash · Pixel Graphics

Astro Prospector
Shared: Action Roguelike · Casual · Bullet Hell

Dungreed
Shared: Action Roguelike · Roguelite · Roguelike