Games like Alien Break
Games like Alien Break include Vampire Survivors, Megabonk, Timberman, Planes, Bullets and Vodka, and Goobies. We matched them by the tags players give Alien Break on Steam (Casual, 3D, Singleplayer, Arcade, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Singleplayer · Casual

Megabonk
Shared: Bullet Hell · Indie · Singleplayer

Timberman
Shared: Casual · Singleplayer · Indie

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

Goobies
Shared: 3D · Casual · Bullet Hell

Project Lazarus
Shared: Casual · Bullet Hell · 3D

DJMAX RESPECT V
Shared: Casual · Singleplayer · Action

LUFTRAUSERS
Shared: Arcade · Bullet Hell · Indie

MUSYNX
Shared: Singleplayer · Casual · Arcade

A Dance of Fire and Ice
Shared: Singleplayer · Arcade · Indie

Superflight
Shared: Casual · Singleplayer · Indie

Brotato
Shared: Singleplayer · Bullet Hell · Indie

Zuma's Revenge!
Shared: Casual · Singleplayer · Action

Crab Champions
Shared: Arcade · 3D · Casual

Super Hexagon
Shared: Arcade · Singleplayer · Indie

Geometry Wars: Retro Evolved
Shared: Casual · Arcade · Singleplayer

AudioSurf
Shared: Casual · Arcade · Singleplayer

Get Off My Lawn!
Shared: Casual · Singleplayer · Indie

Cyberhunt
Shared: Casual · Action · Indie

Windowkill
Shared: Action · Arcade · Bullet Hell

Exit the Gungeon
Shared: Arcade · Bullet Hell · Action

Yet Another Zombie Survivors
Shared: Arcade · Singleplayer · Indie

MARVEL Tōkon: Fighting Souls
Shared: Casual · Arcade · Action

Apocalypse Party
Shared: Casual · Singleplayer · Bullet Hell

