Games like Astro Fighters 2
Games like Astro Fighters 2 include Bit Blaster XL, Sky Force Reloaded, Ikaruga, Nova Drift, and DoDonPachi Resurrection. We matched them by the tags players give Astro Fighters 2 on Steam (Bullet Hell, Shoot 'Em Up, Arcade, Score Attack, and Shooter): closest matches first, and among equally close ones the better-known games.

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

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

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

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

DoDonPachi Resurrection
Shared: Shoot 'Em Up · Bullet Hell · Arcade

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

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

Geometry Wars™ 3: Dimensions Evolved
Shared: Arcade · Shoot 'Em Up · Bullet Hell

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

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

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

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

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

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

KILL KNIGHT
Shared: Bullet Hell · Arcade · Score Attack

Assault Android Cactus+
Shared: Bullet Hell · Shoot 'Em Up · Shooter

Nex Machina
Shared: Bullet Hell · Arcade · Shoot 'Em Up

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

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

Phoenix Force
Shared: Bullet Hell · Shoot 'Em Up · Difficult

Bot Vice
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter

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

Swarmlake
Shared: Arcade · Bullet Hell · Shooter

Cuphead
Shared: Difficult · Bullet Hell · Local Co-Op