Balatro

The royal flush is a poker hand formed by an ace-high straight with all cards of a single suit. So 10, jack, queen, king, and an ace, all one suit. In regular poker the odds of getting this hand are astronomically low, and because of that it is the most powerful hand. In Balatro it's still quite rare but still possible with the use of game mechanics such as wild cards (these cards can be substituted for any suit), discards, and by adding extra aces and face cards to the deck. You have a higher chance of getting a royal flush with the checkered deck (only spades and hearts, no clubs or diamonds), however this deck is unlocked by winning a run with the hardest deck, the black deck (-1 hand per round). The painted deck may also be a good choice due to its larger hand size, but this requires winning a run on a higher difficulty level (green stake).