Classic Battleship on dual 10×10 grids. Place your fleet, then take turns firing one shot at a time (no Salvo).

• Fleet: Carrier (5), Battleship (4), Cruiser (3), Submarine (3), Destroyer (2). Ships may touch.
• Placement: Select a ship from the tray, press Rotate or R to turn, then click your board. Ready starts combat when all ships are placed.
• Combat: You fire first. Click an enemy cell. Misses mark water; hits mark ships. Sunk ships are announced and revealed on the enemy board.
• Win: Sink the entire enemy fleet. Lose: your fleet is sunk.
• AI: Easy fires at random. Medium hunts orthogonally after a hit. Hard continues along aligned hits and uses checkerboard hunting.
• New Game restarts placement on the same level. Change Level returns to the difficulty screen.