Dominoes is a family of tile-based games played with rectangular "domino" tiles. each domino is a rectangular tile with a line dividing its face into two square ends. each end is marked with a number of spots (also called pips, nips, or dobs) or is blank. the backs of the dominoes in a set are indistinguishable, either blank or having some common design. the domino gaming pieces make up a domino set, sometimes called a deck or pack. the traditional sino-european domino set consists of 28 dominoes, featuring all combinations of spot counts between zero and six. a domino set is a generic gaming device, similar to playing cards or dice, in that a variety of games can be played with a set. have fun with this easy t learn the game.