Answer:
Some "gaucho" games are:
La Taba: it is a game like flipping a coin, they trowed a bone, and if the facing upside was the face, the player wins, otherwise he lost, they used this for betting.
Truco: It is a card game, where lying and tricking your opponents is almost crucial to win.
La Doma: Maybe one the most known one, a gaucho is presented to a wild horse, and he tries to mount the animal for the longest period of time possible.