With the help of these cards, players may be able to switch hands, steal cards from rivals, or even alter the rules for a particular round. Because players must choose when to use these potent cards for maximum imptien pattiact, these elements add another level of strategy. The round is won when a player declares "Rummy Mars!" after successfully melding all of their cards. The way a game is scored depends on the house rules, but generally speaking, points are awarded for any unmelded cards that are still in the hands of the opposition. A strong grasp of one's own hand and the tactics used by rival players is essential for success in Rummy Mars.