Games like Dark Card
Games like Dark Card include Clair Obscur: Expedition 33, Inscryption, The Last Spell, Griftlands, and OMORI. We matched them by the tags players give Dark Card on Steam (Card Battler, RPG, Exploration, Perma Death, and Turn-Based Strategy): closest matches first, and among equally close ones the better-known games.

Clair Obscur: Expedition 33
Shared: RPG · Exploration · Story Rich

Inscryption
Shared: Card Battler · Card Game · Story Rich

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

Griftlands
Shared: Card Battler · RPG · Card Game

OMORI
Shared: RPG · Story Rich · Indie

Library Of Ruina
Shared: Card Game · Story Rich · Turn-Based Combat

Chained Echoes
Shared: RPG · Exploration · 2D

Darkest Dungeon®
Shared: RPG · Turn-Based Combat · Perma Death

Drova - Forsaken Kin
Shared: RPG · Exploration · 2D

The World of Kungfu: Dragon and Eagle
Shared: RPG · Indie · 2D

Undertale
Shared: RPG · Story Rich · 2D

Look Outside
Shared: RPG · Exploration · 2D

Terraria
Shared: 2D · Exploration · Pixel Graphics

Turnip Boy Commits Tax Evasion
Shared: Exploration · RPG · Top-Down

Journey to the West
Shared: Card Battler · RPG · Card Game

DELTARUNE
Shared: RPG · Story Rich · 2D

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

Ib
Shared: Exploration · RPG · 2D

Cross Blitz
Shared: RPG · Card Battler · Card Game

Thea 2: The Shattering
Shared: RPG · Card Battler · Turn-Based Strategy

Sultan's Game
Shared: RPG · Card Game · Story Rich

Felvidek
Shared: RPG · 2D · Turn-Based Combat

Arco
Shared: RPG · Turn-Based Strategy · Exploration

Impostor Factory
Shared: RPG · Story Rich · 2D