Games like Touhou ~Red Empress Devil.
Games like Touhou ~Red Empress Devil. include Vampire Survivors, Enter the Gungeon, Nuclear Throne, SYNTHETIK: Legion Rising, and Voidigo. We matched them by the tags players give Touhou ~Red Empress Devil. on Steam (Twin Stick Shooter, Top-Down Shooter, Bullet Hell, Mystery Dungeon, and Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Action Roguelike · Roguelite

Enter the Gungeon
Shared: Bullet Hell · Action Roguelike · Twin Stick Shooter

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Roguelite · Twin Stick Shooter

Voidigo
Shared: Twin Stick Shooter · Bullet Hell · Action Roguelike

Megabonk
Shared: Bullet Hell · Action Roguelike · Roguelite

BALL x PIT
Shared: Bullet Hell · Top-Down Shooter · Roguelite

Blazing Beaks
Shared: Top-Down Shooter · Action Roguelike · Shooter

Relic Hunters Zero: Remix
Shared: Twin Stick Shooter · Top-Down Shooter · Action Roguelike

Rocket Rats
Shared: Bullet Hell · Action Roguelike · Roguelite

Snezhinka:Sentinel Girls2
Shared: Twin Stick Shooter · Bullet Hell · Action Roguelike

SYNTHETIK 2
Shared: Top-Down Shooter · Twin Stick Shooter · Roguelite

20 Minutes Till Dawn
Shared: Bullet Hell · Top-Down Shooter · Action Roguelike

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

Marfusha:Sentinel Girls
Shared: Twin Stick Shooter · Shooter · Female Protagonist

Star of Providence
Shared: Bullet Hell · Roguelite · Action Roguelike

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

Deep Rock Galactic: Survivor
Shared: Bullet Hell · Top-Down Shooter · Action Roguelike

Boneraiser Minions
Shared: Bullet Hell · Action Roguelike · Roguelite

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

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

Atomicrops
Shared: Bullet Hell · Twin Stick Shooter · Action Roguelike

Tiny Rogues
Shared: Bullet Hell · Top-Down Shooter · Action Roguelike

Army of Ruin
Shared: Bullet Hell · Top-Down Shooter · Action Roguelike