Games like Kingmaker Academy: Warrior's Duels
Games like Kingmaker Academy: Warrior's Duels include Slay the Spire, Slay the Spire 2, Balatro, 9 Kings, and Die in the Dungeon. We matched them by the tags players give Kingmaker Academy: Warrior's Duels on Steam (Roguelike Deckbuilder, Card Battler, Roguelike, Deckbuilding, and Turn-Based Combat): closest matches first, and among equally close ones the better-known games.

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

Slay the Spire 2
Shared: Roguelike · Deckbuilding · Roguelike Deckbuilder

Balatro
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

9 Kings
Shared: Roguelike · Roguelike Deckbuilder · RPG

Die in the Dungeon
Shared: Roguelike · Roguelike Deckbuilder · Deckbuilding

Dicey Dungeons
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

Super Fantasy Kingdom
Shared: Roguelike · RPG · Roguelike Deckbuilder

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

Chrono Ark
Shared: Roguelike Deckbuilder · RPG · Indie

Monster Train
Shared: Card Battler · Deckbuilding · Roguelike

Gordian Quest
Shared: Card Battler · RPG · Card Game

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

Wildfrost
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

Roguebook
Shared: Deckbuilding · Indie · RPG

Breachway
Shared: Roguelike · Roguelike Deckbuilder · Deckbuilding

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

Hand of Fate
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

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

Dice & Fold
Shared: Card Battler · Roguelike Deckbuilder · Roguelike

DICEOMANCER
Shared: Card Battler · Roguelike Deckbuilder · Deckbuilding

Griftlands
Shared: Card Battler · Deckbuilding · RPG

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

Inscryption
Shared: Card Battler · Deckbuilding · Card Game

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