Games like Marimoth
Games like Marimoth include Vampire Survivors, LUFTRAUSERS, Planes, Bullets and Vodka, Bit Blaster XL, and BALL x PIT. We matched them by the tags players give Marimoth on Steam (Indie, Action, Arcade, Pixel Graphics, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Pixel Graphics · Indie · Bullet Hell

LUFTRAUSERS
Shared: Indie · Arcade · Action

Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Arcade

Bit Blaster XL
Shared: Shoot 'Em Up · Arcade · Bullet Hell

BALL x PIT
Shared: Action · Arcade · Shoot 'Em Up

Hotline Miami
Shared: Action · Indie · Pixel Graphics

ZeroRanger
Shared: Indie · Shoot 'Em Up · Action

Exit the Gungeon
Shared: Indie · Arcade · Action

Hotline Miami 2: Wrong Number
Shared: Pixel Graphics · Action · Indie

UBERMOSH Vol.5
Shared: Indie · Action · Arcade

UFO 50
Shared: Indie · Action · Pixel Graphics

Cyberhunt
Shared: Indie · Action · Shoot 'Em Up

Broforce
Shared: Action · Pixel Graphics · Indie

Blazing Chrome
Shared: Action · Indie · Pixel Graphics

Revolution Ace
Shared: Action · Indie · Shoot 'Em Up

Enter the Gungeon
Shared: Pixel Graphics · Indie · Bullet Hell

Skul: The Hero Slayer
Shared: Indie · Action · Pixel Graphics

Sky Force Reloaded
Shared: Arcade · Shoot 'Em Up · Action

DRAINUS
Shared: Action · Indie · Shoot 'Em Up

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Indie · Retro

BLUE REVOLVER
Shared: Indie · Action · Shoot 'Em Up

Timberman
Shared: Indie · Pixel Graphics · Action

Nuclear Throne
Shared: Indie · Pixel Graphics · Action

Star of Providence
Shared: Indie · Shoot 'Em Up · Action