Stacker is a game merchandiser manufactured by LAI Games, first produced in 2004. The goal of the game is to align rows of lights on top of each other. A player who stacks 11 rows can choose to take a minor prize. A minor prize is usually low in value, sometimes lower than the amount of money the player paid to play the game. A player who stacks the blocks to the top row wins the jackpot prize, called the "major prize." Major prizes vary from machine-to-machine but will often include high-value items such as game consoles, mobile phones, and gift cards.