Games like Prism Indigo DX
Games like Prism Indigo DX include Bit Blaster XL, BALL x PIT, Vampire Survivors, Rabi-Ribi, and Mirage Feathers. We matched them by the tags players give Prism Indigo DX on Steam (Bullet Hell, Anime, Pixel Graphics, Minimalist, and Arcade): closest matches first, and among equally close ones the better-known games.

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

BALL x PIT
Shared: Bullet Hell · Arcade · Pixel Graphics

Vampire Survivors
Shared: Bullet Hell · Pixel Graphics · Arcade

Rabi-Ribi
Shared: Anime · Bullet Hell · Pixel Graphics

Mirage Feathers
Shared: Anime · Bullet Hell · Shoot 'Em Up

TEVI
Shared: Anime · Bullet Hell · Pixel Graphics

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

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

DoDonPachi Resurrection
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter

Dimension Tripper Neptune: TOP NEP
Shared: Bullet Hell · Arcade · Anime

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

LUFTRAUSERS
Shared: Bullet Hell · Pixel Graphics · Arcade

Bot Vice
Shared: Bullet Hell · Pixel Graphics · Top-Down Shooter

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

Mushihimesama
Shared: Bullet Hell · Arcade · Anime

20 Minutes Till Dawn
Shared: Bullet Hell · Shoot 'Em Up · Pixel Graphics

UBERMOSH:BLACK
Shared: Bullet Hell · Arcade · Pixel Graphics

Neptunia Shooter
Shared: Bullet Hell · Anime · Pixel Graphics

Last Command
Shared: Bullet Hell · Anime · Female Protagonist

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

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

UBERMOSH Vol.3
Shared: Pixel Graphics · Arcade · Bullet Hell

Touhou Hero of Ice Fairy
Shared: Bullet Hell · Anime · Female Protagonist

DELTARUNE
Shared: Pixel Graphics · Bullet Hell · Story Rich