Games like Granny's Rampage
Games like Granny's Rampage include Vampire Survivors, BALL x PIT, Halls of Torment, Nuclear Throne, and Megabonk. We matched them by the tags players give Granny's Rampage on Steam (Bullet Hell, Action, PvE, Shooter, and Arcade): closest matches first, and among equally close ones the better-known games.

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

BALL x PIT
Shared: Action · Bullet Hell · Arcade

Halls of Torment
Shared: Bullet Hell · Action · Pixel Graphics

Nuclear Throne
Shared: Bullet Hell · Action · Pixel Graphics

Megabonk
Shared: Bullet Hell · Action · Action Roguelike

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

LUFTRAUSERS
Shared: Bullet Hell · Action · Arcade

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

Exit the Gungeon
Shared: Action · Bullet Hell · Arcade

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

Nova Drift
Shared: Bullet Hell · Arcade · Shooter

Death Must Die
Shared: Bullet Hell · Action · Pixel Graphics

Deep Rock Galactic: Survivor
Shared: Bullet Hell · PvE · Action

Rocket Rats
Shared: Bullet Hell · Action · Pixel Graphics

Bit Blaster XL
Shared: Bullet Hell · Shooter · Arcade

Star of Providence
Shared: Bullet Hell · Action · Pixel Graphics

Rogue: Genesia
Shared: Bullet Hell · Arcade · PvE

Windowkill
Shared: Action · Bullet Hell · Arcade

Broforce
Shared: Action · 2D · Pixel Graphics

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

20 Minutes Till Dawn
Shared: Bullet Hell · Action Roguelike · Pixel Graphics

BlazBlue Entropy Effect
Shared: Action · 2D · Pixel Graphics

Dungreed
Shared: Action · Pixel Graphics · 2D

Commando Collection
Shared: Action · Bullet Hell · Shooter