Games like Combat Rush
Games like Combat Rush include Sky Force Reloaded, BALL x PIT, Vampire Survivors, 20 Minutes Till Dawn, and Planes, Bullets and Vodka. We matched them by the tags players give Combat Rush on Steam (Indie, Bullet Hell, Shoot 'Em Up, Singleplayer, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Arcade

BALL x PIT
Shared: Bullet Hell · Action · Arcade

Vampire Survivors
Shared: Bullet Hell · Indie · Singleplayer

20 Minutes Till Dawn
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter

Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Action

Cyberhunt
Shared: Indie · Shoot 'Em Up · Action

LUFTRAUSERS
Shared: Indie · Bullet Hell · Arcade

UBERMOSH Vol.5
Shared: Indie · Arcade · Bullet Hell

Revolution Ace
Shared: Indie · Shoot 'Em Up · Bullet Hell

Megabonk
Shared: Indie · Bullet Hell · Singleplayer

Apocalypse Party
Shared: Singleplayer · Bullet Hell · Top-Down Shooter

Hotline Miami
Shared: Indie · Action · Top-Down

Project Wingman
Shared: Indie · Action · Singleplayer

Star Saviors
Shared: Bullet Hell · Shoot 'Em Up · Indie

ZeroRanger
Shared: Indie · Shoot 'Em Up · Bullet Hell

Brotato
Shared: Bullet Hell · Singleplayer · Indie

UBERMOSH Vol.3
Shared: Indie · Action · Arcade

Yet Another Zombie Survivors
Shared: Indie · Top-Down Shooter · Singleplayer

Nex Machina
Shared: Bullet Hell · Indie · Arcade

Touhou Tenkuushou ~ Hidden Star in Four Seasons.
Shared: Bullet Hell · Shoot 'Em Up · Indie

Noobs Want to Live
Shared: Bullet Hell · Action · 2.5D

Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Arcade

Crimzon Clover World EXplosion
Shared: Bullet Hell · Shoot 'Em Up · Action

Ikaruga
Shared: Bullet Hell · Shoot 'Em Up · Arcade