Gambling

Gambling, as a minigame, requires Link to risk Rupees for a chance to win a higher amount. These games are purely chance with, typically, no possibility of strategizing for a win.

Legend of Zelda
On Eastmost Peninsula, the Old Man inside the tree has 3 rupees lined up. To play, walk over one rupee and Link may either lose the amount shown, lose more, or win rupees.

A Link to the Past
Just south of Kakariko Village, there is a house in which Link can gamble. First pay 20 rupees, then select one of the three chests. A similar game is in the northwest corner of the Village of Outcasts. In this incarnation, there are fifteen chests. The "grand prize" is a piece of heart.

Majora's Mask
At Romani Ranch, Link can gamble by betting on dog races.

The Minish Cap
Borlov runs a Treasure Chest Game in which Link chooses one of two treasure chests. With a successful choice Link may chose to continue gambling, although Borlov tries to talk Link out of playing. As soon as a loss occurs, the game ends.

Four Swords Adventures
A Dark World home in the Village of the Blue Maiden offers a gambling game to risk 100 Force Gems for a choice of 3 chests. The chests contain: 300 Rupees, 100 Rupees, or 1 single Rupee.

A second game run by a Zuna can be found in the Desert of Doubt. The risks and rewards are unchanged.

Phantom Hourglass
Occasionally, a spirit named Lucky Lee will be "dug up". He offers Link the chance to play a game. After paying 50 rupees, Link chooses between a large and a small chest. It doesn't matter which is chosen, the outcomes are the same. Upon a correct guess, Link wins 150 rupees. For an incorrect guess, rupees are lost.