Ninety-nine is a simple card game based on addition and reportedly popular among the Romani people.

Due to the simple strategy and focus on basic addition, the game is sometimes used to cultivate math skills in children.

That player loses the deal and must turn in or discard one of their tokens, after which all cards are then collected and a new hand is dealt.

The game's strategy, therefore, revolves around cultivating a hand that can survive for as long as possible once ninety-nine is reached.

Another strategy is to raise the total to 99 early by use of the required card (usually a 9 or King depending on house rules) in the hopes of catching another player unprepared.

Cards depicting Greek deities have special functions, e.g. playing Poseidon subtracts 10 from the current count.

Players must keep the running countdown timer at 60 seconds or fewer in order to guard their bomb tokens from "exploding".