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

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

Vampire Survivors
Shared: Action Roguelike · Roguelite · Indie

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

Hades
Shared: Action Roguelike · Indie · Roguelite

Megabonk
Shared: Action Roguelike · Indie · Roguelite

Rogue Legacy
Shared: Indie · Action · Platformer

Dungreed
Shared: Action Roguelike · Action · Roguelite

Halls of Torment
Shared: Action Roguelike · Roguelite · Action

BALL x PIT
Shared: Action · Roguelite · Action Roguelike

Rogue Legacy 2
Shared: Action · Indie · Platformer

Downwell
Shared: Action Roguelike · Indie · Pixel Graphics

Streets of Rogue
Shared: Action Roguelike · Roguelite · Action

Nuclear Throne
Shared: Action Roguelike · Indie · Action

BlazBlue Entropy Effect
Shared: Action · Action Roguelike · Platformer

ScourgeBringer
Shared: Action · Indie · Roguelite

Realm of the Mad God Exalt
Shared: Pixel Graphics · Action Roguelike · Perma Death

UnderMine
Shared: Action Roguelike · Roguelite · Indie

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

Caveblazers
Shared: Action Roguelike · Platformer · Roguelite

Dead Cells
Shared: Action Roguelike · Pixel Graphics · Roguelite

Spelunky
Shared: Action Roguelike · Indie · Platformer

Hades II
Shared: Action · Roguelite · Action Roguelike

Death Must Die
Shared: Action Roguelike · Roguelite · Action

Broforce
Shared: Action · Pixel Graphics · Indie