Troggu is a member of the tarot family of card games. Synonyms for the games name are: Trogga, Tappu, Tappä. It is played in the area of Visp, Switzerland, in Upper Wallis, especially in St. Niklaus and Grächen. After Troccas, it is the second most played tarot card game in Switzerland, but it is endangered as it is played only by older people in a small region. It is uncertain whether a young generation continues the tradition of this game and its survival is currently unclear.
According to card game author, John McLeod, Troggu was probably invented in the late 18th century. The reasons for this assumption concerns the rules for the fool. In earlier Tarot card games and in modern French Tarot, The fool is played as an "Excuse", a card which exempts the player from following suit. In modern Tarock games in such regions as Austria and Hungary, the fool is played as Tarock XXII, the highest ranking trump. The rules of Troggu contain a mixture of both variations and may be a transitional game from the traditional rules of the fool to the more modern one.