Get 4 Description:

The object of Get 4 is to connect four concurrent circles of the same colour before the computer. The circles can be connected horizontally, vertically, or diagonally.

The rules for Get 4 are simple. The game is played on an upright seven column board. Each column has six vacant spots. The player and the computer play by alternately populating a circle in one of the columns. The circle drops to the lowest unoccupied spot in that column. The first player to get four circles in a row, either vertical, horizontal, or diagonal, wins. The game ends in a stalemate if it fills before someone wins.