Games like Abyss Deck
Games like Abyss Deck include Balatro, Slay the Spire, Slay the Spire 2, 9 Kings, and Inscryption. We matched them by the tags players give Abyss Deck on Steam (Card Game, Card Battler, Auto Battler, Roguelite, and Roguelike): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Card Game · Roguelike · Deckbuilding

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

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

9 Kings
Shared: Auto Battler · Card Game · Roguelike

Inscryption
Shared: Card Game · Card Battler · Deckbuilding

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

Monster Train
Shared: Card Battler · Card Game · Roguelite

Super Fantasy Kingdom
Shared: Auto Battler · Roguelike · Card Game

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

Loop Hero
Shared: Roguelike · Roguelite · Deckbuilding

Ratropolis
Shared: Card Battler · Roguelite · Deckbuilding

Griftlands
Shared: Card Battler · Roguelite · Card Game

Dicey Dungeons
Shared: Card Battler · Roguelite · Deckbuilding

Dungeons & Degenerate Gamblers
Shared: Card Game · Roguelike · Card Battler

He is Coming
Shared: Auto Battler · Roguelike · Roguelite

Cross Blitz
Shared: Card Game · Roguelite · Card Battler

Stacklands
Shared: Card Game · Card Battler · Roguelite

Wildfrost
Shared: Card Battler · Card Game · Roguelite

Ballionaire
Shared: Roguelike · Deckbuilding · Singleplayer

Roguebook
Shared: Card Game · Deckbuilding · Roguelite

DICEOMANCER
Shared: Card Game · Card Battler · Strategy

Hadean Tactics
Shared: Card Battler · Auto Battler · Card Game

Combolands: Roguelike Citybuilder
Shared: Roguelite · Roguelike · Strategy

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