Games like Bustbound
Games like Bustbound include Slay the Spire 2, Slay the Spire, Balatro, 9 Kings, and Die in the Dungeon. We matched them by the tags players give Bustbound on Steam (Strategy, Card Battler, Roguelike Deckbuilder, Card Game, and Roguelike): closest matches first, and among equally close ones the better-known games.

Slay the Spire 2
Shared: Card Game · Strategy · Roguelike

Slay the Spire
Shared: Roguelike Deckbuilder · Card Battler · Card Game

Balatro
Shared: Card Game · Roguelike Deckbuilder · Roguelike

9 Kings
Shared: Strategy · Card Game · Roguelike

Die in the Dungeon
Shared: Strategy · Roguelike · Card Game

Dicey Dungeons
Shared: Card Battler · Roguelike Deckbuilder · Strategy

Monster Train
Shared: Card Battler · Card Game · Roguelike

DICEOMANCER
Shared: Strategy · Card Battler · Card Game

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Card Battler · Strategy · Roguelike

Inscryption
Shared: Card Battler · Card Game · Deckbuilding

Griftlands
Shared: Card Battler · Strategy · Card Game

Dungeons & Degenerate Gamblers
Shared: Strategy · Roguelike Deckbuilder · Roguelike

Super Fantasy Kingdom
Shared: Strategy · Roguelike · Card Game

Breachway
Shared: Strategy · Card Game · Roguelike

Vault of the Void
Shared: Roguelike Deckbuilder · Strategy · Card Battler

Monster Train 2
Shared: Roguelike Deckbuilder · Card Game · Strategy

Wildfrost
Shared: Card Battler · Roguelike Deckbuilder · Card Game

Ratropolis
Shared: Card Battler · Strategy · 2D

Decktamer
Shared: Roguelike Deckbuilder · Card Battler · Card Game

Loop Hero
Shared: Roguelike · Deckbuilding · Card Game

RACCOIN: Coin Pusher Roguelike
Shared: Strategy · Roguelike Deckbuilder · Roguelike

Astrea: Six-Sided Oracles
Shared: Card Battler · Roguelike Deckbuilder · Card Game

My Card Is Better Than Your Card!
Shared: Card Game · Strategy · Roguelike

Roguebook
Shared: Card Game · Strategy · Deckbuilding