RogueJack21 is an unusual deckbuilding game that transforms classic blackjack rules into a tactical roguelike experience. Each hand becomes a battle of chance and risk, where decisions to draw, stand, or double trigger chains of effects that influence the battle and subsequent progress. Blackjack as a combat system Gameplay revolves around deck building, with each suit playing a specific role. Spades increase damage, hearts restore health, clubs boost luck, and diamonds allow you to steal chips to purchase new cards and upgrades. The tactical combination of suits shapes your playstyle and determines your survival strategy. The journey takes you through a procedurally generated casino world filled with hidden events, dishonest dealers, and unexpected challenges. Levels are never repeated, opponents receive random decks and bonuses, and the increasing difficulty requires adaptation. Every victory feels like the result of calculation, not luck. Features of the game Deckbuilding based on blackjack rules. Tactical use of card suits. Procedurally generated levels and enemies. Several difficulty levels and unique bosses.