Black Jacket transforms blackjack into a surprisingly deep roguelite deckbuilder, where hitting 21 is merely the starting point. Modifiable cards, special effects, increasingly absurd combos, and tables with unique powers turn every match into a war of manipulation and infernal sabotage. The gameplay manages to evolve continuously, shifting from a simple card game into a true turn-based strategy title. The decadent horror atmosphere is also excellent. There are, however, a few limitations: the grinding required to build a truly competitive deck can feel repetitive, and—as in all games of chance—some matches ultimately depend more on luck than on pure skill.