For thousands of years, Zeus has been the ruler of Olympus. After countless attempts from the other gods to overthrow him, he announces a final fighting contest among the twelve gods, allowing them to use their special powers to the fullest. Only one god will rule Olympus. Who will prevail? In OMG, players play cards from their hands trying to match the color, the number, or the god of the previous card while also making use of the gods' special powers. The first player to empty his hand wins.