Jungle Gin plays a lot like the card game Gin rummy, but this time in a tropical setting. Two players face each other, trying to collect groups of cards called "melds", while discarding the cards that don't fit into them. There are two types of melds: runs, which are groups of three or more cards of the same suit in sequence (for example 10, Jack, Queen of diamonds), and sets - three or four cards of the same rank. The remaining cards, which don't belong to either are called deadwood. Every turn, a player draws one card from either the stock pile or the discard pile and at the same time discards an unwanted one.

In Gin, all the cards have a value. The face cards score 10 points each, the aces - one point, while the numerical cards score the value they display. When a player remains with an amount of deadwood worth 10 points or less, he can knock his opponent. If the opponent has more points of deadwood, the knock is successful; if not, the former is underknocked and loses this round. "Going gin" means winning the round with zero points of deadwood. The winner is awarded a number of points. For going gin the player receives 20 points, for underknocking - 10 points, while for knocking he receives the difference between his opponent's deadwood points and his own's. The first player who reaches 100 points after several rounds wins the game and can try his luck with a jackpot spin. A match can last until 300, 500 or 700 points, and deals with additional bonuses for games or hands won.

Using the game options, some of the rules can be changed, for example switching from Straight Gin to Oklahoma Gin or not allowing knocking.

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