Games like Mace Knight
Games like Mace Knight include Vampire Survivors, Bit Blaster XL, Exit the Gungeon, LUFTRAUSERS, and Shovel Knight: Treasure Trove. We matched them by the tags players give Mace Knight on Steam (PvE, Difficult, Arcade, Bullet Hell, and 2D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · 2D · Pixel Graphics

Bit Blaster XL
Shared: Difficult · Bullet Hell · Arcade

Exit the Gungeon
Shared: Arcade · Bullet Hell · Action

LUFTRAUSERS
Shared: Arcade · Bullet Hell · 2D

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · 2D · Difficult

A Dance of Fire and Ice
Shared: Difficult · Arcade · 2D

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

UFO 50
Shared: Arcade · 2D · Pixel Graphics

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

Super Meat Boy
Shared: Difficult · 2D · Pixel Graphics

BALL x PIT
Shared: Arcade · Bullet Hell · Action

Timberman
Shared: Pixel Graphics · 2D · Arcade

Orbt XL
Shared: Difficult · Arcade · 2D

Skul: The Hero Slayer
Shared: Action · 2D · Pixel Graphics

Jump King
Shared: Difficult · 2D · Pixel Graphics

Cuphead
Shared: Difficult · 2D · Bullet Hell

Super Hexagon
Shared: Difficult · Arcade · Action

SUPER CHICKEN JUMPER
Shared: Difficult · Arcade · 2D

Titan Souls
Shared: Difficult · Pixel Graphics · Action

Geometry Dash
Shared: Difficult · 2D · Arcade

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

Boneraiser Minions
Shared: Bullet Hell · 2D · Pixel Graphics

Archvale
Shared: Bullet Hell · Action · 2D

Celeste
Shared: Difficult · Pixel Graphics · 2D