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

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

Balatro
Shared: Deckbuilding · Roguelike Deckbuilder · Card Game

Slay the Spire 2
Shared: Deckbuilding · Card Battler · Roguelike Deckbuilder

9 Kings
Shared: RPG · Strategy · Deckbuilding

Dicey Dungeons
Shared: Card Battler · Roguelike Deckbuilder · Deckbuilding

Gordian Quest
Shared: RPG · Card Battler · Strategy

Roguebook
Shared: RPG · Indie · Deckbuilding

Griftlands
Shared: Card Battler · Deckbuilding · RPG

Overdungeon
Shared: Indie · RPG · Card Battler

Chrono Ark
Shared: RPG · Roguelike Deckbuilder · Indie

Dungeons & Degenerate Gamblers
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

Die in the Dungeon
Shared: Deckbuilding · Strategy · Card Battler

Wildfrost
Shared: Card Battler · Roguelike Deckbuilder · Deckbuilding

Across the Obelisk
Shared: Adventure · Roguelike Deckbuilder · Card Battler

Super Fantasy Kingdom
Shared: RPG · Strategy · Deckbuilding

Monster Train
Shared: Card Battler · Deckbuilding · Roguelite

Deep Sky Derelicts
Shared: RPG · Card Battler · Roguelike Deckbuilder

Inscryption
Shared: Card Battler · Deckbuilding · Card Game

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

Vault of the Void
Shared: Indie · Deckbuilding · Roguelike Deckbuilder

Fate Hunters
Shared: Card Battler · Roguelike Deckbuilder · Indie

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

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

HELLCARD
Shared: Card Battler · RPG · Deckbuilding