Games like Space Mayhem
Games like Space Mayhem include Vampire Survivors, Bit Blaster XL, PAC-MAN™ Championship Edition DX+, Planes, Bullets and Vodka, and LUFTRAUSERS. We matched them by the tags players give Space Mayhem on Steam (Score Attack, Arcade, Bullet Hell, Old School, and Fast-Paced): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Pixel Graphics · Arcade

Bit Blaster XL
Shared: Bullet Hell · Arcade · Difficult

PAC-MAN™ Championship Edition DX+
Shared: Arcade · Score Attack · Retro

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

LUFTRAUSERS
Shared: Arcade · Bullet Hell · Pixel Graphics

Orbt XL
Shared: Arcade · Score Attack · Controller

Super Hexagon
Shared: Arcade · Fast-Paced · Difficult

Hotline Miami 2: Wrong Number
Shared: Fast-Paced · Pixel Graphics · Retro

Megabonk
Shared: Bullet Hell · Arcade · Pixel Graphics

Timberman
Shared: Arcade · Pixel Graphics · Casual

UBERMOSH
Shared: Arcade · Pixel Graphics · Fast-Paced

UBERMOSH Vol.5
Shared: Arcade · Fast-Paced · Bullet Hell

UFO 50
Shared: Arcade · Retro · Pixel Graphics

Trip to Vinelands
Shared: Arcade · Fast-Paced · Retro

Hotline Miami
Shared: Pixel Graphics · Fast-Paced · Retro

Exit the Gungeon
Shared: Arcade · Bullet Hell · Pixel Graphics

Boneraiser Minions
Shared: Bullet Hell · Pixel Graphics · Arcade

Super Meat Boy
Shared: Difficult · Pixel Graphics · Fast-Paced

Savant - Ascent
Shared: Score Attack · Fast-Paced · Bullet Hell

Super Bit Blaster XL
Shared: Bullet Hell · Arcade · Controller

Devil Daggers
Shared: Fast-Paced · Retro · Difficult

Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: Arcade · Controller · Score Attack

UBERMOSH Vol.3
Shared: Arcade · Fast-Paced · Bullet Hell

