Games like Shards of Infinity
Games like Shards of Infinity include Slay the Spire, Inscryption, Slay the Spire 2, Balatro, and The Bazaar. We matched them by the tags players give Shards of Infinity on Steam (Deckbuilding, Card Battler, Strategy, Card Game, and Board Game): closest matches first, and among equally close ones the better-known games.

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

Inscryption
Shared: Card Battler · Deckbuilding · Card Game

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

Balatro
Shared: Deckbuilding · Card Game · Strategy

The Bazaar
Shared: Deckbuilding · Strategy · Card Battler

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

Monster Train
Shared: Card Battler · Deckbuilding · Card Game

Magic: The Gathering Arena
Shared: Strategy · Card Game · Deckbuilding

GWENT: The Witcher Card Game
Shared: Strategy · Card Game · Deckbuilding

Library Of Ruina
Shared: Card Game · Deckbuilding · Strategy

Griftlands
Shared: Card Battler · Deckbuilding · Card Game

DICEOMANCER
Shared: Strategy · Card Battler · Card Game

9 Kings
Shared: Strategy · Deckbuilding · Card Game

Shadowverse: Worlds Beyond
Shared: Card Battler · Deckbuilding · Strategy

Stacklands
Shared: Card Game · Card Battler · Strategy

Yu-Gi-Oh! Legacy of the Duelist
Shared: Card Battler · Deckbuilding · Card Game

Dicey Dungeons
Shared: Card Battler · Deckbuilding · Strategy

Dune: Imperium
Shared: Deckbuilding · Strategy · Board Game

Ratropolis
Shared: Deckbuilding · Card Battler · Strategy

Ascension: Deckbuilding Game
Shared: Deckbuilding · Card Battler · Board Game

NEOVERSE
Shared: Deckbuilding · Card Battler · Card Game

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

Animation Throwdown: The Quest for Cards
Shared: Card Battler · Strategy · Card Game

Vault of the Void
Shared: Deckbuilding · Strategy · Card Battler