Games like Ardor
Games like Ardor include Balatro, Slay the Spire 2, Library Of Ruina, Slay the Spire, and 9 Kings. We matched them by the tags players give Ardor on Steam (Deckbuilding, Grid-Based Movement, Singleplayer, Strategy, and Turn-Based Combat): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Deckbuilding · Singleplayer · Card Game

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

Library Of Ruina
Shared: Deckbuilding · Strategy · Card Game

Slay the Spire
Shared: Deckbuilding · Card Game · Strategy

9 Kings
Shared: Strategy · Deckbuilding · Card Game

RACCOIN: Coin Pusher Roguelike
Shared: Deckbuilding · Strategy · Singleplayer

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

Die in the Dungeon
Shared: Deckbuilding · Strategy · Turn-Based Combat

Ballionaire
Shared: Singleplayer · Deckbuilding · 2D

Nubby's Number Factory
Shared: Strategy · Singleplayer · Deckbuilding

Roguebook
Shared: Deckbuilding · Singleplayer · Strategy

Banana
Shared: Singleplayer · 2D · Casual

Ratropolis
Shared: Deckbuilding · 2D · Strategy

Plants vs. Zombies GOTY Edition
Shared: Singleplayer · Strategy · 2D

Darkest Dungeon®
Shared: Turn-Based Combat · Singleplayer · Strategy

Game Dev Tycoon
Shared: Strategy · Singleplayer · 2D

FrostBound
Shared: Deckbuilding · Strategy · Singleplayer

Pit People®
Shared: Turn-Based Combat · Strategy · 2D

Breachway
Shared: Deckbuilding · Strategy · Card Game

Heretic's Fork
Shared: Deckbuilding · Strategy · Card Game

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

Dungeons & Degenerate Gamblers
Shared: Deckbuilding · Strategy · Card Game

Rana Card
Shared: Deckbuilding · Strategy · Card Game

The Last Spell
Shared: Strategy · Singleplayer · Turn-Based Combat