Games like Shmup Arena
Games like Shmup Arena include Bit Blaster XL, Nova Drift, Star Saviors, Chippy, and ZeroRanger. We matched them by the tags players give Shmup Arena on Steam (Indie, Shoot 'Em Up, Difficult, Action, and Arena Shooter): closest matches first, and among equally close ones the better-known games.

Bit Blaster XL
Shared: Shoot 'Em Up · Difficult · Action

Nova Drift
Shared: Shoot 'Em Up · Arena Shooter · Bullet Hell

Star Saviors
Shared: Shoot 'Em Up · Indie · Action

Chippy
Shared: Shoot 'Em Up · Arena Shooter · Difficult

ZeroRanger
Shared: Indie · Shoot 'Em Up · Action

Ikaruga
Shared: Shoot 'Em Up · Action · Difficult

Devil Daggers
Shared: Indie · Difficult · Action

Cuphead
Shared: Difficult · Indie · 2D

Hotline Miami
Shared: Indie · Action · Difficult

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Difficult · Action

Revolution Ace
Shared: Shoot 'Em Up · Indie · Action

LUFTRAUSERS
Shared: Indie · Action · Shoot 'Em Up

Star of Providence
Shared: Shoot 'Em Up · Indie · Action

Nuclear Throne
Shared: Indie · Difficult · Action

FTL: Faster Than Light
Shared: Indie · Space · Difficult

Cyberhunt
Shared: Indie · Action · Shoot 'Em Up

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

Enter the Gungeon
Shared: Difficult · Indie · Bullet Hell

Sky Force Reloaded
Shared: Shoot 'Em Up · Indie · Action

Hotline Miami 2: Wrong Number
Shared: Action · Difficult · Indie

Zombotron
Shared: Indie · Action · Shoot 'Em Up

Intrusion 2
Shared: Indie · Action · Difficult

Defy Gravity Extended
Shared: Indie · Space · Action

Furi
Shared: Difficult · Shoot 'Em Up · Bullet Hell