Games like Gordian Quest
Games like Gordian Quest include Slay the Spire, Balatro, Slay the Spire 2, 9 Kings, and Across the Obelisk. We matched them by the tags players give Gordian Quest on Steam (RPG, Card Game, Card Battler, Strategy, and Adventure): closest matches first, and among equally close ones the better-known games.

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

Balatro
Shared: Card Game · Strategy · Roguelike Deckbuilder

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

9 Kings
Shared: RPG · Strategy · Card Game

Across the Obelisk
Shared: Adventure · Card Game · Tactical

Chrono Ark
Shared: RPG · Strategy · Card Game

Roguebook
Shared: RPG · Card Game · Strategy

Monster Train
Shared: Card Battler · Card Game · Strategy

Overdungeon
Shared: RPG · Strategy · Card Battler

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

Griftlands
Shared: Card Battler · RPG · Card Game

Dicey Dungeons
Shared: Card Battler · Card Game · Strategy

Super Fantasy Kingdom
Shared: RPG · Strategy · Card Game

Die in the Dungeon
Shared: Card Game · Strategy · Card Battler

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

Astrea: Six-Sided Oracles
Shared: Card Battler · Card Game · Strategy

Backpack Hero
Shared: Replay Value · Turn-Based · Strategy

Yao-Guai Hunter
Shared: Card Game · Card Battler · Replay Value

Wildfrost
Shared: Card Battler · Card Game · Roguelike Deckbuilder

Deck of Ashes
Shared: RPG · Card Battler · Strategy

Magic: The Gathering Arena
Shared: Card Game · Strategy · PvP

For The King
Shared: RPG · Strategy · Turn-Based

Knock on the Coffin Lid
Shared: Card Game · Card Battler · Strategy

LONESTAR
Shared: Strategy · Card Battler · Replay Value