Various Rules
Round the world
Also called "Round the Board" or "Once Round the Island. The object of this popular game is to be the first player to hit every number on the dartboard from 1-20. Any part of the number - single, double or triple - counts. The numbers must be hit in order, and players alternate after three throws. If a player cannot pass a certain number, he must hit it in order to advance to the next number on the board.
Dartball/Baseball
a game in which darts are thrown at a large wooden or board that resembles a baseball field with colored areas which denote bases. This game is similar to the actual game of baseball and uses baseball-like rules and scoring.. Players try to score as many points as possible per inning in order to win.
Killer
Each player throws one dart with the "opposite" hand. (e.g., right-handers throw left-handed) to determine randomly his or her own number. If a player misses the board or hits a number already taken, he or she throws again. Each player first tries to hit the double of his or her own number. When this is achieved, the player is known as a "killer" and a K is placed after his name on the scoreboard.
Shanghai
Players take turns throwing at the numbers 1, 2, and so on, in sequence, until 7. They try to score as many points as possible per turn (using all three darts). Only darts hitting the number in play count for score. So, when the number 1 is in play, the highest score that can be achieved is three - if the player hits a 1 with each dart. However, when the number 7 is the number in play, the highest score could be a 21 - if the player hits 7 all three times. Obviously, as the game progresses, the score gets higher. There are two ways to win: either have the highest score at the end of the game or score a Shanghai and win automatically. A shanghai is hitting the single, double and triple of the number in play.
Legs
After determining the order of the play, the first player attempts to get the highest score possible and notes it on the scoreboard. The next player must exceed that score or "lose a leg". Each player starts with three legs and players lose a leg every time they fail to beat the score of the player immediately preceding them. The winner is the last player left with any legs.
Clock: also called round the clock, and is a variation that involves hitting the numbers in sequence.