Games like Abettor
Games like Abettor include Vampire Survivors, BALL x PIT, Deep Rock Galactic: Survivor, Windowkill, and Glyphica: Typing Survival. We matched them by the tags players give Abettor on Steam (Action, Arcade, Action Roguelike, Bullet Hell, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · 2D

BALL x PIT
Shared: Action · Arcade · Bullet Hell

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

Windowkill
Shared: Action · Action Roguelike · Arcade

Glyphica: Typing Survival
Shared: Action Roguelike · Action · Bullet Hell

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Action

Death Must Die
Shared: Action Roguelike · Bullet Hell · Action

Megabonk
Shared: Action Roguelike · Bullet Hell · Action

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

Nova Drift
Shared: Arcade · Bullet Hell · Action Roguelike

Rogue: Genesia
Shared: Action Roguelike · Bullet Hell · Arcade

Nuclear Throne
Shared: Action Roguelike · Action · Bullet Hell

Yet Another Zombie Survivors
Shared: Action Roguelike · Top-Down Shooter · Arcade

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Action

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · 2D

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Action

Goobies
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Action

Relic Hunters Zero: Remix
Shared: Action · Action Roguelike · Top-Down Shooter

Tiny Rogues
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

Sky Force Reloaded
Shared: Arcade · Bullet Hell · Action

Slime 3K: Rise Against Despot
Shared: Action Roguelike · Bullet Hell · 2D

Monsters are Coming!
Shared: Action · Bullet Hell · Action Roguelike

Brotato
Shared: Action Roguelike · Bullet Hell · Arcade

