Games like Line Defense
Games like Line Defense include X Invader, Nova Drift, Deep Rock Galactic: Survivor, 20 Minutes Till Dawn, and Sky Force Reloaded. We matched them by the tags players give Line Defense on Steam (Arena Shooter, Bullet Hell, Shoot 'Em Up, Hack and Slash, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.
X Invader
Shared: Arena Shooter · Shoot 'Em Up · Bullet Hell
Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Arena Shooter
Deep Rock Galactic: Survivor
Shared: Bullet Hell · Arena Shooter · Top-Down Shooter
20 Minutes Till Dawn
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter
Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Top-Down Shooter
Chippy
Shared: Bullet Hell · Arena Shooter · Shoot 'Em Up
Furi
Shared: Bullet Hell · Hack and Slash · Shoot 'Em Up
Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Shooter
SNKRX
Shared: Arena Shooter · Shoot 'Em Up · Top-Down Shooter
MADNESS: Project Nexus
Shared: Arena Shooter · Hack and Slash · Shooter
BALL x PIT
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter
Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Shooter
Harbinger
Shared: Arena Shooter · Shoot 'Em Up · Bullet Hell
Sektori
Shared: Shoot 'Em Up · Arena Shooter · Bullet Hell
Brotato
Shared: Bullet Hell · Arena Shooter · Hack and Slash
Geometry Arena 2
Shared: Arena Shooter · Hack and Slash · Bullet Hell
Insect Swarm
Shared: Shoot 'Em Up · Top-Down Shooter · Shooter
Time Wasters
Shared: Bullet Hell · Arena Shooter · Shoot 'Em Up
Larva Mortus
Shared: Bullet Hell · Shoot 'Em Up · Hack and Slash
Slime 3K: Rise Against Despot
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter
State of Anarchy: Master of Mayhem
Shared: Bullet Hell · Top-Down Shooter · Shoot 'Em Up
Bot Vice
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter
Glyphica: Typing Survival
Shared: Arena Shooter · Bullet Hell · Top-Down Shooter
Titan Attacks!
Shared: Arena Shooter · Bullet Hell · Shoot 'Em Up