Games like Internet Survivor Survivors
Games like Internet Survivor Survivors include Vampire Survivors, Megabonk, Halls of Torment, Death Must Die, and Boneraiser Minions. We matched them by the tags players give Internet Survivor Survivors on Steam (Bullet Heaven, Action Roguelike, Roguelite, Bullet Hell, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

Megabonk
Shared: Bullet Heaven · Action Roguelike · Roguelite

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

Death Must Die
Shared: Action Roguelike · Roguelite · Bullet Hell

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

BALL x PIT
Shared: Roguelite · Bullet Hell · Action Roguelike

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Heaven · Roguelite

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

Soulstone Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

Nuclear Throne
Shared: Action Roguelike · Pixel Graphics · Bullet Hell

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Nova Drift
Shared: Roguelite · Bullet Hell · Action Roguelike

Rogue: Genesia
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

The Spell Brigade
Shared: Bullet Heaven · Roguelite · Bullet Hell

Skul: The Hero Slayer
Shared: Action Roguelike · Pixel Graphics · Roguelite

Nordic Ashes: Survivors of Ragnarok
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

Brotato
Shared: Action Roguelike · Bullet Hell · Bullet Heaven

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Roguelite

Snezhinka:Sentinel Girls2
Shared: Action Roguelike · Pixel Graphics · Anime

Hell Maiden
Shared: Bullet Heaven · Action Roguelike · Roguelite

I Am Legion: Stand Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

Cursorblade
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

Yet Another Zombie Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

Necrosmith
Shared: Action Roguelike · Roguelite · Bullet Hell