Sea Battle: Battleship-style game online free

Yes. Sea Battle is completely free to play online, with no sign-up, no download and no in-app purchases. It runs in your browser on computers, tablets and phones, and your rank, records and badges are saved on your device.

Sea Battle is a Battleship-style game, the classic pencil-and-paper naval game also known as Sea Battle, Battleships or Morskoy Boy: each side hides a fleet on a 10 × 10 grid and takes turns calling shots until one fleet is sunk. This version has its own art, rules options and features. Battleship is a trademark of Hasbro; Sea Battle is an independent game and is not affiliated with or endorsed by it.

First place your fleet on your grid: drag ships to move them, tap a ship to turn it, or press Shuffle. Then fire at the enemy sea by tapping or clicking a square. A white dot means a miss and a red cross means a hit. When every square of a ship is hit, it sinks. Sink the whole enemy fleet before the enemy sinks yours.

Classic rules use 10 ships (one of 4 squares, two of 3, three of 2 and four of 1). Ships may not touch each other, not even at the corners, and a hit lets you fire again. When a ship sinks, the water around it is marked automatically. Modern rules use 5 ships of 5, 4, 3, 3 and 2 squares, ships may touch, and the players take turns one shot at a time.

Easy fires almost at random. Normal hunts on a checkerboard pattern and finishes a ship once it finds one. Hard works out the probability of every square from all the ways the remaining ships could still be placed, so it is a real challenge.

Yes. Choose 2 players: each player places a fleet, then you pass the device back and forth. A privacy screen hides both fleets while the device changes hands, so nobody can peek.

The Daily battle puts the same enemy fleet in the same places for every player each day, with Classic rules. Win it in as few shots as you can and compare on the Daily leaderboard.

Wins against the computer are ranked by the number of shots you needed: fewer is better. There are boards for Classic rules, Modern rules and the Daily battle, for today, this week and all time. You only choose a nickname if you want to join.

Every battle earns XP: more for winning, fewer shots, better accuracy, ships still afloat and harder opponents. XP promotes you through 10 naval ranks, from Cadet to Admiral.

Search in a checkerboard pattern, because every ship covers at least two squares in a row (in Modern rules), then finish a ship as soon as you hit it. With Classic rules ships never touch, so the squares around a sunk ship are always empty. When you hide your fleet, avoid patterns and mix ships at the edges and in open water.

Yes. Sea Battle works in portrait and landscape on phones and tablets. In portrait the enemy sea is large on top and your fleet is shown below; tap a square to fire.