Battleship.bas allows for horizontal and vertical placement of five naval ships of length 2, 3, 3, 4, and 5. The grid size is 10x10 and one plays against the computer. The user can select between two versions. One version allows one guess per round. The other is the Salvo version where one receives one guess per round for each ship they have that has not yet been sunk. Control is via the keyboard. Battleship+.bas allows for diagonal, horizontal, and vertical placement of either 5, 10, 15, 20, 25, or 30 ships of lengths 2, 3, 3, 4, and 5. The user chooses the grid size which can be 10x10, 15x15, 20x20, or 25x25. One plays against the computer. Like Battleship.bas, the user can select between the regular version with one shot per round or the Salvo version.