Plays the game of "42", which is a bidding-type dominoes game similar to bridge, spades, or pinochle. The computer plays the positions of three players, and you are the fourth. It also can be used to learn the game by suggesting plays, and explaining the reason for its suggestions. Recent versions add doubles high or low in Nel-O, plus the ability to play "sevens".

Lets you play the traditional game of dominoes, where you line up the tiles and try to make the ends total a multiple of five. You can play two, three, or four players.