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

Slay the Spire 2
Shared: Card Game · Co-op · Roguelike

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

Balatro
Shared: Roguelike Deckbuilder · Card Game · Roguelike

9 Kings
Shared: Card Game · Roguelike Deckbuilder · Roguelike

HELLCARD
Shared: Co-op · Card Battler · Roguelike

Super Fantasy Kingdom
Shared: Roguelike · RPG · Card Game

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

Monster Train
Shared: Card Battler · Card Game · Deckbuilding

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

Gordian Quest
Shared: Card Game · Card Battler · RPG

Dicey Dungeons
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

Across the Obelisk
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Breachway
Shared: Card Game · Roguelike Deckbuilder · Roguelike

Wildfrost
Shared: Roguelike Deckbuilder · Card Battler · Card Game

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

He is Coming
Shared: Roguelike · RPG · Card Game

Roguebook
Shared: Card Game · RPG · Deckbuilding

Chrono Ark
Shared: Roguelike Deckbuilder · RPG · Card Game

Inscryption
Shared: Card Game · Card Battler · Deckbuilding

Griftlands
Shared: Card Battler · Deckbuilding · Card Game

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

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

For The King
Shared: RPG · Roguelike · Co-op

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