Connect 4 is a two-player connection game in which the players first choose a color and then take turns dropping colored discs from the top into a seven column, six row, vertically suspended grid. The pieces fall straight down, occupying the next available space within the column. The objective of the game is to connect four of your own discs of the same color next to one another vertically, horizontally, or diagonally, before your opponent connects four of theirs.
Players introduce discs on the top of the columns. The introduced disc drops down the board if the column is empty. Future discs introduced in the same column will stack over the previous ones.