Games like River Rush
Games like River Rush include Planes, Bullets and Vodka, Vampire Survivors, LUFTRAUSERS, Bit Blaster XL, and BALL x PIT. We matched them by the tags players give River Rush on Steam (Shoot 'Em Up, 1980s, Bullet Hell, Arcade, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

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

Vampire Survivors
Shared: Bullet Hell · Pixel Graphics · Arcade

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

Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Arcade

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

Cyberhunt
Shared: Shoot 'Em Up · Casual · Arcade

Razortron 2000
Shared: 1980s · Casual · Arcade

ZeroRanger
Shared: Shoot 'Em Up · Bullet Hell · Pixel Graphics

Hotline Miami
Shared: Pixel Graphics · 1980s · Top-Down

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

UFO 50
Shared: Pixel Graphics · Arcade · Retro

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

Hotline Miami 2: Wrong Number
Shared: Pixel Graphics · 1980s · Retro

Geometry Wars: Retro Evolved
Shared: Arcade · Bullet Hell · Casual

Distant Space
Shared: Shoot 'Em Up · Arcade · Pixel Graphics

Huntdown
Shared: Pixel Graphics · Shoot 'Em Up · Shooter

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

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

BLUE REVOLVER
Shared: Shoot 'Em Up · Bullet Hell · Arcade

ARCADE GAME SERIES: GALAGA
Shared: Shoot 'Em Up · Arcade · Retro

METAL SLUG X
Shared: Arcade · Shoot 'Em Up · Retro

Exit the Gungeon
Shared: Arcade · Bullet Hell · Pixel Graphics

DRAINUS
Shared: Shoot 'Em Up · Bullet Hell · Pixel Graphics