Lotto America was the first lottery game offered by MUSL. In 1987, six states and the District of Columbia banded together, since, on their own, they could not create jackpots into the tens of millions of dollars that had become commonplace in the most popular single-state lottery games. MUSL's first game was called "Lotto America" even though only those seven jurisdictions took part. The first Lotto America drawing was in 1988.
Unclaimed prizes are kept by the lottery jurisdiction. If a Grand Prize goes unclaimed, the money must be returned to all lotteries in proportion to their sales for the draw run. The lotteries then distribute the money, based on their own jurisdiction's laws, to other lottery games or to their jurisdiction's general fund, or otherwise as required by law.
MUSL and its members accept all investment risk and are contractually obligated and liable to the winner to make all scheduled payments to annuity winners. If a jackpot ticket is not claimed, the funds in the prize pool are returned to members in proportion to the amount they contributed to the prize pool. The members have different rules regulating how unclaimed funds are used.
Two identical machines are used for each drawing, randomly selected from four sets. The model of machine used is the Halogen, manufactured by Smartplay International of Edgewater Park, New Jersey. There are eight ball sets (four of each color); one set of each color is randomly selected before a drawing. The balls are mixed by a turntable at the bottom of the machine that propels the balls around the chamber. When the machine selects a ball, the turntable slows to catch it, sends it up the shaft, and then down the rail to the display.
Power Play, when it began in 2001, was drawn with a special wheel. In 2006 and 2007, MUSL replaced one of the 5× spaces on the Power Play wheel with a 10×. During each month-long promotion, MUSL guaranteed that there would be at least one drawing with a 10× multiplier. The promotion returned in 2008; the ball landed in the 10× space twice. After being absent in 2009, the 10× multiplier returned in May 2010 (after the Power Play drawing was changed to RNG.) The promotion was extended for the only time, as the 10× multiplier was not drawn until June 12. The second prize 5× guarantee continued; the 10× applied to all non-jackpot prizes, as in previous promotions.