Games like Earth Attack
Games like Earth Attack include Vampire Survivors, Megabonk, Planes, Bullets and Vodka, Among Us, and 20 Minutes Till Dawn. We matched them by the tags players give Earth Attack on Steam (Action, Casual, Survival, Bullet Hell, and Runner): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · 2D · Casual

Megabonk
Shared: Bullet Hell · Action · Survival

Planes, Bullets and Vodka
Shared: Action · Casual · Bullet Hell

Among Us
Shared: Survival · 2D · Space

20 Minutes Till Dawn
Shared: Survival · Bullet Hell · Casual

Bit Blaster XL
Shared: Bullet Hell · Action · Casual

Cyberhunt
Shared: Action · Casual · Indie

Timberman
Shared: Casual · Action · 2D

Dark Deception
Shared: Runner · Action · Survival

Terraria
Shared: Survival · 2D · Action

ALTF4
Shared: Survival · Runner · Action

Brotato
Shared: Bullet Hell · Survival · Singleplayer

Starbound
Shared: Survival · Space · Casual

FatalZone
Shared: Survival · Bullet Hell · Action

BALL x PIT
Shared: Action · Bullet Hell · Top-Down

Angel at Dusk
Shared: Action · Bullet Hell · 2D

Gem Defender: Soyjak Survivors
Shared: Action · Bullet Hell · Survival

Noobs Want to Live
Shared: Action · Bullet Hell · Casual

Rocket Rats
Shared: Casual · Bullet Hell · Action

Aliens: Dark Descent
Shared: Action · Aliens · Top-Down

Enter the Gungeon
Shared: Bullet Hell · Indie · Action

Hotline Miami
Shared: Action · Top-Down · Indie

WAVESHAPER
Shared: Action · Casual · 2D

Resident Evil 4
Shared: Action · Survival · Singleplayer