Games like Touhou Brawl
Games like Touhou Brawl include Deep Rock Galactic: Survivor, Brotato, Megabonk, Nova Drift, and Arms of God. We matched them by the tags players give Touhou Brawl on Steam (Action Roguelike, Arena Shooter, Hero Shooter, Spectacle fighter, and Bullet Heaven): closest matches first, and among equally close ones the better-known games.

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

Brotato
Shared: Action Roguelike · Bullet Hell · Bullet Heaven

Megabonk
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

Nova Drift
Shared: Action Roguelike · Arena Shooter · Bullet Hell

Arms of God
Shared: Action Roguelike · Bullet Heaven · Arena Shooter

Vital Shell
Shared: Action Roguelike · Bullet Heaven · Arena Shooter

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

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

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

Pathogenic
Shared: Action Roguelike · Bullet Hell · Bullet Heaven

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

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

Time Wasters
Shared: Action Roguelike · Bullet Heaven · Arena Shooter

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

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

Yet Another Zombie Survivors
Shared: Action Roguelike · Bullet Heaven · Top-Down Shooter

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

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

Glyphica: Typing Survival
Shared: Action Roguelike · Arena Shooter · Bullet Hell

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

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

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