Games like Epic Action Packs
Games like Epic Action Packs include Slay the Spire, Monster Train, Slay the Spire 2, Balatro, and Wildfrost. We matched them by the tags players give Epic Action Packs on Steam (Turn-Based Tactics, Card Battler, Roguelite, Roguelike Deckbuilder, and Difficult): closest matches first, and among equally close ones the better-known games.

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

Monster Train
Shared: Card Battler · Roguelite · Turn-Based Tactics

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

Balatro
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Wildfrost
Shared: Card Battler · Roguelike Deckbuilder · Turn-Based Tactics

StarVaders
Shared: Turn-Based Tactics · Roguelike Deckbuilder · Roguelite

9 Kings
Shared: Roguelike Deckbuilder · Card Game · Strategy

LONESTAR
Shared: Turn-Based Tactics · Card Battler · Roguelike Deckbuilder

Alina of the Arena
Shared: Turn-Based Tactics · Roguelike Deckbuilder · Roguelite

Dicey Dungeons
Shared: Card Battler · Roguelike Deckbuilder · Roguelite

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

As We Descend
Shared: Card Battler · Roguelike Deckbuilder · Turn-Based Tactics

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

Inscryption
Shared: Card Battler · Card Game · Roguelite

Roguebook
Shared: Roguelite · Card Game · Turn-Based Tactics

Monster Train 2
Shared: Roguelike Deckbuilder · Turn-Based Tactics · Card Game

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

Black Jacket
Shared: Roguelike Deckbuilder · Card Game · Roguelite

Breachway
Shared: Roguelike Deckbuilder · Card Battler · Card Game

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

Dungeons & Degenerate Gamblers
Shared: Roguelike Deckbuilder · Card Battler · Roguelite

Touhou: Lost Branch of Legend
Shared: Roguelike Deckbuilder · Card Battler · Turn-Based Tactics

Super Fantasy Kingdom
Shared: Roguelite · Strategy · Roguelike

DICEOMANCER
Shared: Card Battler · Roguelike Deckbuilder · Card Game