Games like Catacomb Kids
Games like Catacomb Kids include Skul: The Hero Slayer, Vampire Survivors, The Binding of Isaac: Rebirth, Hades, and Risk of Rain (2013). We matched them by the tags players give Catacomb Kids on Steam (Action Roguelike, Indie, Roguelite, Action, and RPG): closest matches first, and among equally close ones the better-known games.

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

Vampire Survivors
Shared: Action Roguelike · Roguelite · Indie

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

Hades
Shared: Action Roguelike · Roguelite · Indie

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

Dungreed
Shared: Action Roguelike · Roguelite · Indie

UnderMine
Shared: Action Roguelike · Roguelite · Indie

Noita
Shared: Indie · Pixel Graphics · Action Roguelike

Death Must Die
Shared: Action Roguelike · Roguelite · RPG

Rogue Legacy
Shared: Indie · Action Roguelike · Platformer

Streets of Rogue
Shared: Action Roguelike · Roguelite · RPG

Enter the Gungeon
Shared: Action Roguelike · Indie · Pixel Graphics

Nuclear Throne
Shared: Action Roguelike · Indie · Action

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

Spelunky
Shared: Action Roguelike · Indie · Platformer

Hades II
Shared: Action · Roguelite · Action Roguelike

Heroes of Hammerwatch
Shared: Action Roguelike · Roguelite · Indie

Wizard of Legend
Shared: Action Roguelike · Pixel Graphics · Action

BlazBlue Entropy Effect
Shared: Action Roguelike · Action · Platformer

Halls of Torment
Shared: Action Roguelike · Roguelite · Action

Rogue Legacy 2
Shared: Indie · Action · Roguelite

Vagante
Shared: Action Roguelike · Action · Roguelite

Dead Cells
Shared: Action Roguelike · Roguelite · Pixel Graphics

Heroes of Hammerwatch II
Shared: Action Roguelike · RPG · Action