Games like The Core
Games like The Core include Vampire Survivors, Nova Drift, Brotato, Megabonk, and BALL x PIT. We matched them by the tags players give The Core on Steam (Action, Action Roguelike, Arcade, Roguelike, and Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelike

Nova Drift
Shared: Arcade · Action Roguelike · Bullet Hell

Brotato
Shared: Roguelike · Action Roguelike · Bullet Hell

Megabonk
Shared: Action Roguelike · Roguelike · Action

BALL x PIT
Shared: Action · Arcade · Action Roguelike

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

Halls of Torment
Shared: Action Roguelike · Action · Roguelike

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · Indie

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Roguelike

The Binding of Isaac
Shared: Action Roguelike · Roguelike · Action

Nuclear Throne
Shared: Action Roguelike · Roguelike · Action

Crab Champions
Shared: Action Roguelike · Roguelike · Arcade

Hades
Shared: Action Roguelike · Action · Roguelike

Risk of Rain 2
Shared: Action Roguelike · Action · Roguelike

Rogue Legacy
Shared: Action Roguelike · Roguelike · Action

Exit the Gungeon
Shared: Action · Arcade · Bullet Hell

ODDCORE
Shared: Roguelike · Arena Shooter · Boomer Shooter

Spelunky
Shared: Action Roguelike · Roguelike · Arcade

Windowkill
Shared: Action · Action Roguelike · Arcade

Returnal™
Shared: Action · Roguelike · Action Roguelike

Soulstone Survivors
Shared: Action Roguelike · Roguelike · Action

Risk of Rain (2013)
Shared: Action Roguelike · Roguelike · Action

Hades II
Shared: Action · Roguelike · Action Roguelike

Dungreed
Shared: Action Roguelike · Action · Roguelike