Billiards, also known as cue sports, are games played on a rectangular table with balls and a stick called a cue. The most common types are 8-ball and 9-ball. In 8-ball, players must sink balls of the same category (stripes or solids) before pocketing the 8-ball. In 9-ball, the lowest numbered ball must be struck first until the 9-ball is sunk to win. Proper equipment includes cue sticks, billiard balls, and a table with pockets. Games are won by clearing one's category of balls and then sinking the final ball into the designated pocket.