Sea Battle online

Sea Battle is the classic pen-and-paper naval game, online: you place your ships in secret and take turns firing at each other's sea. The first to sink the whole enemy fleet wins. At Mezar Café you play without an account or download, with a friend through one room code or against a bot.

Last updated: 14 November 2026

Play Sea Battle

Sea Battle: your turn, misses and burning hits on the enemy sea, your own sea on the right

At a glance

Players	2
Sea	Quick 8×8 (4 ships), Classic 10×10 (5 ships), Large 12×12 (6 ships): the host chooses
Classic fleet	Admiral (5), Cruiser (4), Destroyer (3), Submarine (3), Patrol boat (2)
Placement	75 seconds: shuffle, drag, tap to rotate
Turn time	20, 30, 45 or 60 seconds (the host chooses)
Cosmetics	Your character, frame and title show at the table; they only change looks

How to play Sea Battle

The game starts with placement: your ships are laid out at random; shuffle again, drag them around or tap to rotate. Press «Ready» and wait; when time runs out, the current layout is used.
Ships are straight (horizontal or vertical) and can't touch each other, not even at the corners.
On your turn, fire at a square in your opponent's sea. A hit earns another shot; a miss passes the turn.
A sunk ship is revealed and the squares around it are marked automatically: ships can't touch, so nothing can be there.
The first to sink every enemy ship wins.

Tips that win games

Start by sweeping the sea like a checkerboard: the smallest ship is 2 squares, so firing at every other square can't miss one.
After a hit, try the neighbouring squares; two hits in a row give away the ship's direction, so follow that line.
The area around a sunk ship is empty: look for the widest open spaces for the remaining ships.
Spread your own ships out instead of clustering them, so a sweep of one area can't find them all.

How do the bots play?

Bots keep firing around a ship they've hit until it sinks, then work out the most likely squares on the sea. In our own measurements on the classic sea, the easy bot sinks a fleet in about 68 shots on average, normal in 51 and hard in 40, so the levels feel clearly different.

Play Sea Battle

Frequently asked

How do you play Sea Battle?

Place your ships in secret, then take turns firing at your opponent's sea. A hit earns another shot, a miss passes the turn. The first to sink every ship wins.

How many players?

Two. No friend around? Press «With bots» to play a bot right away.

Can ships touch?

No. Ships can't touch, not even at the corners, which is why the squares around a sunk ship are marked empty automatically.

What happens after a hit?

You fire again. After a miss, the turn passes.

Can I change the sea size?

Yes. The host picks Quick 8×8, Classic 10×10 or Large 12×12; the bigger the sea, the bigger the fleet.

Is it free?

Yes. You can play free as a guest without an account, with no ads.

More Mezar Café games: Bluff · Hortlak · Grave Pishti · Black Cat · Ludo · 8-Ball Pool · Mezarpoly