Battleship is a two-player online game utilizing strategy, logical thought, and a fair amount of guessing, in which two players go about blasting each other's hidden ships. The objective of Battleship is to try and sink the opponent's ship – while guessing where they might be – before they sink all of your ships.

Typically two players compete against each other (or you play against the computer) from a 10×10 grid in Battleship. The individual squares in the grids are identified by letter and number coordinates. Each game can vary in the number (normally 2 to 5) of ships employed but common practice is to have five ships of differing sizes on the grid. An aircraft carrier is five squares long, a battleship is four squares long, both a submarine and a destroyer are three squares long and a patrol boat is two squares long.

Before play begins, each player secretly arranges their ships on their primary grid. Each ship occupies a number of consecutive squares on the grid, arranged either horizontally or vertically. The number of squares for each Battleship is determined by the type of ship. The ships cannot overlap or be placed diagonally. The types and numbers of ships allowed are the same for each player. After the ships are set up on the board according to the rules of the game, the game then begins with each opponent firing in turn to sink their opponent’s fleet. When a player hits an opponent’s ship, they can fire again.

Once it is determined who will go first, that person will pick a square at random, calling it by its reference (or coordinate as indicated earlier) of the column reference letter and number (C3 for example). This represents their firing of a missile directly at that square. If the opposing player has any part of one of their ships positioned on this square they must call “hit” and mark on their battlefield (first grid) which part has been hit.

At the same time, the attacking player will place an “X” on their blank grid (the mirror of their opponent's field they set up) to show a hit. In this instance, the first player will now be allowed to make another guess. This continues until the attacking player misses. Whichever player that first succeeds in destroying their opponent’s entire Battleship fleet first wins the game.

Battleship actually has a long history which dates from World War I where it had its origins as a French game, L'Attaque played during the war. Since that point forward it was published by various companies as a pre-printed-pad-and-pencil game in the 1930s. It was released as a plastic board game by Milton Bradley in 1967. A Hollywood movie science fiction action film of the same name and loosely based on the board game was released in the United States in 2012 by Universal Pictures, directed by Peter Berg, and starring Alexander Skarsgård, Taylor Kitsch, Brooklyn Decker, Tadanobu Asano, Liam Neeson, and Rihanna.