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

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

Balatro
Shared: Card Game · Roguelike Deckbuilder · Deckbuilding

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

Dicey Dungeons
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

9 Kings
Shared: Strategy · Card Game · Roguelike Deckbuilder

Wildfrost
Shared: Roguelike Deckbuilder · Card Game · Card Battler

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

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

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

Roguebook
Shared: Card Game · Deckbuilding · Strategy

Yao-Guai Hunter
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Monster Train
Shared: Card Game · Card Battler · Deckbuilding

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

Super Fantasy Kingdom
Shared: Strategy · Card Game · Roguelike

Overdungeon
Shared: Roguelike Deckbuilder · Strategy · Card Battler

DICEOMANCER
Shared: Card Game · Strategy · Roguelike Deckbuilder

Griftlands
Shared: Card Battler · Deckbuilding · Card Game

Breachway
Shared: Strategy · Card Game · Roguelike Deckbuilder

Black Jacket
Shared: Roguelike Deckbuilder · Card Game · Deckbuilding

Inscryption
Shared: Card Game · Card Battler · Deckbuilding

Across the Obelisk
Shared: Roguelike Deckbuilder · Card Game · Deckbuilding

Blood Card
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Banners of Ruin
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Ratropolis
Shared: Card Battler · Deckbuilding · Strategy