Games like Firestorm
Games like Firestorm include Monster Train, Magic: The Gathering Arena, Slay the Spire 2, Slay the Spire, and Balatro. We matched them by the tags players give Firestorm on Steam (Strategy, Deckbuilding, Board Game, Card Game, and Turn-Based Strategy): closest matches first, and among equally close ones the better-known games.

Monster Train
Shared: Deckbuilding · Card Game · Card Battler

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

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

Slay the Spire
Shared: Card Game · Deckbuilding · Strategy

Balatro
Shared: Card Game · Deckbuilding · Strategy

Inscryption
Shared: Deckbuilding · Card Game · Card Battler

Marvels Midnight Suns Digital Edition
Shared: Deckbuilding · Turn-Based Tactics · Turn-Based Strategy

Monster Train 2
Shared: Deckbuilding · Card Game · Strategy

StarVaders
Shared: Deckbuilding · Turn-Based Tactics · Card Game

Stacklands
Shared: Card Game · Strategy · Card Battler

Armello
Shared: Board Game · Strategy · Card Game

The Bazaar
Shared: Strategy · Deckbuilding · Card Game

Dune: Imperium
Shared: Strategy · Board Game · Deckbuilding

Gremlins, Inc.
Shared: Board Game · Strategy · Card Game

Wildfrost
Shared: Card Game · Deckbuilding · Card Battler

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

Wingspan
Shared: Board Game · Strategy · Card Game

9 Kings
Shared: Strategy · Deckbuilding · Card Game

UNO
Shared: Card Game · Board Game · Strategy

Cross Blitz
Shared: Deckbuilding · Strategy · Card Game

Clank!
Shared: Strategy · Deckbuilding · Board Game

NEOVERSE
Shared: Deckbuilding · Card Battler · Turn-Based Strategy

Ascension: Deckbuilding Game
Shared: Deckbuilding · Board Game · Card Game

Dream of Corpse Lady
Shared: Strategy · Card Game · Turn-Based Tactics