Games like CardBoard
Games like CardBoard include Slay the Spire, Slay the Spire 2, Monster Train, Inscryption, and UNO. We matched them by the tags players give CardBoard on Steam (Strategy, Party, Board Game, Card Battler, and Card Game): closest matches first, and among equally close ones the better-known games.

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

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

Monster Train
Shared: Card Battler · Card Game · Roguelite

Inscryption
Shared: Card Battler · Card Game · Strategy

UNO
Shared: Card Game · Board Game · Tabletop

Stacklands
Shared: Card Game · Strategy · Card Battler

Tabletop Simulator
Shared: Board Game · Tabletop · Card Game

Balatro
Shared: Card Game · Strategy · Roguelite

Gremlins, Inc.
Shared: Board Game · Strategy · Card Game

THE GAME OF LIFE 2
Shared: Board Game · Party · Card Game

Armello
Shared: Board Game · Strategy · Card Game

Wildfrost
Shared: Card Battler · Card Game · Roguelite

Talisman: Digital Classic Edition
Shared: Strategy · Board Game · Tabletop

Big Bia
Shared: Strategy · Roguelite · Board Game

Drop Duchy
Shared: Card Battler · Turn-Based Tactics · Roguelite

Rento Fortune: Online Dice Board Game (大富翁)
Shared: Strategy · Board Game · Tabletop

9 Kings
Shared: Strategy · Card Game · Card Battler

GWENT: Rogue Mage (Single-Player Expansion)
Shared: Strategy · Board Game · Card Game

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

Demonic Mahjong
Shared: Strategy · Card Game · Tabletop

Dream of Corpse Lady
Shared: Strategy · Card Game · Card Battler

Unmatched: Digital Edition
Shared: Strategy · Board Game · Card Battler

HEART of CROWN Online
Shared: Strategy · Board Game · Card Game

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