A flop game’s distinguishing characteristic is the set of shared cards displayed in the middle of the table after the first round of betting. Depending on which of the three games you’re playing, the dealer distributes two, three, or four cards face down to each poker player (your hole cards), after which there is a round of betting. At that point, the dealer turns three cards up in the middle of the table, as shown:
So what are the flop games you can play? They are, in order of descending popularity, Hold ’em, Poker Omaha, and Pineapple Poker.