Games like Incremental Space Defense Force League
Games like Incremental Space Defense Force League include BALL x PIT, Bit Blaster XL, Sky Force Reloaded, DoDonPachi Resurrection, and Planes, Bullets and Vodka. We matched them by the tags players give Incremental Space Defense Force League on Steam (Incremental, Shoot 'Em Up, Top-Down Shooter, Action, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

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

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

Sky Force Reloaded
Shared: Shoot 'Em Up · Top-Down Shooter · Bullet Hell

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

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

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

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

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

Cyberhunt
Shared: Action · Shoot 'Em Up · Arcade

Deep Rock Galactic: Survivor
Shared: Top-Down Shooter · Bullet Hell · PvE

Vampire Survivors
Shared: Bullet Hell · 2D · Pixel Graphics

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

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

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

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

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

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

DRAINUS
Shared: Shoot 'Em Up · Action · Shooter

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

HELLDIVERS™ 2
Shared: PvE · Action · Shooter

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

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

Huntdown
Shared: Action · Shoot 'Em Up · Shooter

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