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Tripduel is a card playing game with the buildings of the world. Each card has the properties year of building, area size, maximum height, height over sea level, distance to Equator, and quantity in the game. You can play with this properties against you friends, the better one gets the opponent's card.
Additionally, you receive new cards by visiting the buildings in the world. As soon you are nearby you automatically receive the card and can contest with it against your friends.
Actually more than 175 cards but there will be a lot more!
