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

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

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

Balatro
Shared: Card Game · Roguelike Deckbuilder · Roguelike

9 Kings
Shared: Card Game · RPG · Roguelike Deckbuilder

Inscryption
Shared: Card Game · Card Battler · Deckbuilding

Dicey Dungeons
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

Monster Train
Shared: Card Battler · Card Game · Deckbuilding

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

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

Griftlands
Shared: Card Battler · Deckbuilding · Card Game

Roguebook
Shared: Card Game · RPG · Deckbuilding

Super Fantasy Kingdom
Shared: Roguelike · RPG · Strategy

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

Wildfrost
Shared: Roguelike Deckbuilder · Card Battler · Card Game

DICEOMANCER
Shared: Card Game · Roguelike Deckbuilder · Card Battler

Chrono Ark
Shared: Roguelike Deckbuilder · RPG · Card Game

Hand of Fate
Shared: Roguelike Deckbuilder · Card Game · Deckbuilding

Astrea: Six-Sided Oracles
Shared: Roguelike Deckbuilder · Card Battler · Card Game

Breachway
Shared: Card Game · Roguelike Deckbuilder · Roguelike

Hand of Fate 2
Shared: Roguelike Deckbuilder · Card Game · RPG

He is Coming
Shared: Roguelike · Strategy · RPG

As We Descend
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Yao-Guai Hunter
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Deep Sky Derelicts
Shared: Roguelike Deckbuilder · Card Battler · RPG