Games like Gap Storm
Games like Gap Storm include Slay the Spire, Slay the Spire 2, Balatro, Monster Train, and 9 Kings. We matched them by the tags players give Gap Storm on Steam (Card Battler, Strategy, Roguelite, Difficult, and Casual): closest matches first, and among equally close ones the better-known games.

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

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

Balatro
Shared: Strategy · Card Game · Roguelike

Monster Train
Shared: Card Battler · Roguelite · Card Game

9 Kings
Shared: Strategy · Card Game · Roguelite

Inscryption
Shared: Card Battler · Card Game · Roguelite

Stacklands
Shared: Card Battler · Roguelite · Card Game

Ratropolis
Shared: Card Battler · Roguelite · Strategy

Dicey Dungeons
Shared: Card Battler · Roguelite · Strategy

One Step From Eden
Shared: Roguelite · Card Battler · Difficult

Wildfrost
Shared: Card Battler · Difficult · Roguelite

DICEOMANCER
Shared: Strategy · Card Battler · Card Game

Griftlands
Shared: Card Battler · Roguelite · Strategy

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

Breachway
Shared: Strategy · Card Battler · Card Game

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

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

Slots & Daggers
Shared: Strategy · Casual · Roguelite

Super Fantasy Kingdom
Shared: Strategy · Roguelite · Roguelike

Morimens
Shared: Card Battler · Roguelite · PvP

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

Ballionaire
Shared: Strategy · Casual · Roguelite

He is Coming
Shared: Strategy · Roguelite · Roguelike

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