Games like Space Defense
Games like Space Defense include BALL x PIT, Bit Blaster XL, Cyberhunt, Sky Force Reloaded, and Planes, Bullets and Vodka. We matched them by the tags players give Space Defense on Steam (Casual, Space, Bullet Hell, Top-Down Shooter, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.
BALL x PIT
Shared: Bullet Hell · Action · Arcade
Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Casual
Cyberhunt
Shared: Casual · Action · Shoot 'Em Up
Sky Force Reloaded
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter
Planes, Bullets and Vodka
Shared: Casual · Bullet Hell · Shoot 'Em Up
Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Arcade
Vampire Survivors
Shared: Bullet Hell · Casual · Arcade
Beat Hazard
Shared: Bullet Hell · Shoot 'Em Up · Space
20 Minutes Till Dawn
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter
LUFTRAUSERS
Shared: Bullet Hell · Action · Arcade
Star Saviors
Shared: Bullet Hell · Shoot 'Em Up · Space
Deep Rock Galactic: Survivor
Shared: Bullet Hell · Top-Down Shooter · Action
Starblast
Shared: Space · Casual · Action
Super Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Casual
DoDonPachi Resurrection
Shared: Top-Down Shooter · Bullet Hell · Shoot 'Em Up
Apocalypse Party
Shared: Casual · Top-Down Shooter · Bullet Hell
Distant Space
Shared: Space · Shoot 'Em Up · Casual
Chippy
Shared: Bullet Hell · Top-Down Shooter · Shoot 'Em Up
Epido
Shared: Bullet Hell · Shoot 'Em Up · Casual
Trailmakers
Shared: Space · Action · Flight
TouHou Makuka Sai ~ Fantastic Danmaku Festival
Shared: Bullet Hell · Casual · Action
Polygon Attack
Shared: Casual · Space · Action
Goobies
Shared: Bullet Hell · Top-Down Shooter · Casual
ESCHATOS
Shared: Bullet Hell · Top-Down Shooter · Shoot 'Em Up