Games like MUTEIGHT
Games like MUTEIGHT include Vampire Survivors, Enter the Gungeon, BALL x PIT, Nuclear Throne, and Megabonk. We matched them by the tags players give MUTEIGHT on Steam (Action Roguelike, Mystery, Action, Arcade, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Arcade

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

BALL x PIT
Shared: Action · Arcade · Action Roguelike

Nuclear Throne
Shared: Action Roguelike · Action · Top-Down Shooter

Megabonk
Shared: Action Roguelike · Action · Bullet Hell

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

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Dungeon Crawler · Indie

Blazing Beaks
Shared: Action Roguelike · Action · Top-Down Shooter

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

Wizard of Legend
Shared: Action Roguelike · Action · Dungeon Crawler

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

Exit the Gungeon
Shared: Arcade · Action · Bullet Hell

Broforce
Shared: Action · Local Co-Op · 2D

Brotato
Shared: Action Roguelike · Bullet Hell · Local Co-Op

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

Nova Drift
Shared: Action Roguelike · Arcade · Bullet Hell

Crab Champions
Shared: Action Roguelike · Arcade · Action

Desktop Survivors 98
Shared: Action Roguelike · Action · Bullet Hell

Skul: The Hero Slayer
Shared: Action Roguelike · Action · Indie

Hades
Shared: Action Roguelike · Action · Indie

Windowkill
Shared: Action Roguelike · Action · Arcade

Zombieville USA 3D
Shared: Action · Arcade · Action Roguelike

LUFTRAUSERS
Shared: Action · Arcade · Bullet Hell

UFO 50
Shared: Action · Retro · Arcade