Games like Gem and Tarot
Games like Gem and Tarot include Slay the Spire, Balatro, Slay the Spire 2, Inscryption, and Stacklands. We matched them by the tags players give Gem and Tarot on Steam (Card Battler, Match 3, Roguelite, Card Game, and Tabletop): closest matches first, and among equally close ones the better-known games.

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

Balatro
Shared: Card Game · Roguelike · Roguelite

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

Inscryption
Shared: Card Battler · Card Game · Roguelite

Stacklands
Shared: Card Game · Card Battler · Roguelite

Dicey Dungeons
Shared: Card Battler · Roguelite · Roguelike

Ratropolis
Shared: Card Battler · Roguelite · 2D

Griftlands
Shared: Card Battler · Roguelite · Card Game

Monster Train
Shared: Card Battler · Roguelite · Card Game

9 Kings
Shared: Strategy · Card Game · Roguelike

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

Ballionaire
Shared: Roguelike · Roguelite · 2D

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

Demonic Mahjong
Shared: Card Game · Strategy · Tabletop

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

DICEOMANCER
Shared: Card Battler · Card Game · Strategy

RACCOIN: Coin Pusher Roguelike
Shared: Roguelike · Strategy · Roguelite

The Legend of Bum-Bo
Shared: Roguelite · Match 3 · Strategy

Super Fantasy Kingdom
Shared: Roguelite · Strategy · Roguelike

Wildfrost
Shared: Card Battler · Card Game · Roguelite

My Card Is Better Than Your Card!
Shared: Card Game · Roguelike · Card Battler

Slots & Daggers
Shared: Strategy · Roguelike · Roguelite

Touhou: Lost Branch of Legend
Shared: Card Battler · Card Game · Strategy

Loop Hero
Shared: Roguelite · Roguelike · Card Game