Games like Unsung Knight
Games like Unsung Knight include Slay the Spire, Slay the Spire 2, Balatro, 9 Kings, and Dicey Dungeons. We matched them by the tags players give Unsung Knight on Steam (Strategy, Card Battler, Deckbuilding, Roguelike Deckbuilder, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

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

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

Balatro
Shared: Deckbuilding · Roguelike Deckbuilder · Strategy

9 Kings
Shared: Strategy · Deckbuilding · Card Game

Dicey Dungeons
Shared: Card Battler · Roguelike Deckbuilder · Deckbuilding

Dungeons & Degenerate Gamblers
Shared: Strategy · Roguelike Deckbuilder · Deckbuilding

Inscryption
Shared: Card Battler · Deckbuilding · Card Game

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

DICEOMANCER
Shared: Strategy · Card Battler · Roguelike Deckbuilder

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

Gordian Quest
Shared: Card Battler · Strategy · Card Game

Roguebook
Shared: Deckbuilding · Strategy · Card Game

Overdungeon
Shared: Strategy · Roguelike Deckbuilder · Card Battler

Griftlands
Shared: Card Battler · Deckbuilding · Strategy

Vault of the Void
Shared: Deckbuilding · Roguelike Deckbuilder · Strategy

Ratropolis
Shared: Card Battler · Deckbuilding · Strategy

Super Fantasy Kingdom
Shared: Strategy · Deckbuilding · Card Game

Library Of Ruina
Shared: Strategy · Deckbuilding · Card Game

Across the Obelisk
Shared: Roguelike Deckbuilder · Deckbuilding · Card Battler

Wildfrost
Shared: Card Battler · Roguelike Deckbuilder · Card Game

Monster Train
Shared: Card Battler · Deckbuilding · Card Game

Fate Hunters
Shared: Strategy · Card Battler · Roguelike Deckbuilder

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

Touhou: Lost Branch of Legend
Shared: Strategy · Roguelike Deckbuilder · Card Battler