How it works

Your ship is always under way — you don't control the throttle, you steer (←/→ or A/D). Cannons fire a broadside from whichever side of your hull faces the enemy and the balls fly perpendicular to your heading — so you maneuver to bring your guns to bear. Last ship afloat wins (or first to a set number of sinks in Respawn mode).

Ships — press 1–4 (or tap a card)

Weapons

• Cannons — Space. Auto-aim at the nearest enemy's side. Toggle F between a full broadside volley and rolling fire (one gun per press, each reloading independently).
• Barrel mines — S. Drop off the stern; they arm instantly and drift on the wind. One afloat at a time, ~10s recharge. Most blow on contact or a 10–20s fuse; ~25% are duds. A cannonball detonates one harmlessly.
• Depth charges — Q. You carry as many as you have cannons. They sink for a moment then burst underwater: they devastate submarines at any depth in a wide radius, and the shockwave gives a lighter graze to surface ships caught close. The blast also destroys any torpedo caught in its core and knocks ones skirting the edge off course — a way to swat down an incoming fish.
• Torpedoes — submarines only, Space. Run straight off the bow. Fired on the surface they strike surface ships; fired submerged they only strike other submerged subs.
• Ramming — bury your bow in another hull to take half their max health (you take none).

The submarine

Dive and surface with E (3 seconds each). Submerged, it's invisible to surface players, can't be shot, rammed, mined or depth-charged through the hull, glides under icebergs, and leaves no wake — but it can only torpedo other submerged subs, and it still wrecks on islands and piers (they reach the seabed). Surface to attack surface ships. Its W key toggles the engine instead of sails. Under power it ignores the wind entirely; cut the engine and it goes adrift, pushed by the wind — but only as much of it as is exposed, so it drifts on the surface and barely budges when deep.

Surface ships hunt subs with a sonar sweep that pings every few seconds and reveals a fading contact on any submerged sub, plus depth charges.

Seas & hazards

• Wind — each round rolls a direction and strength (shown by the top dial). Sailing downwind is faster, into the wind slower; across it (broadside-on) is unaffected. Subs ignore wind.
• Islands — solid land: hit one and you sink. Cannon fire leaves scorch craters but never sinks them. Some are settled, with huts and a lighthouse, and a wooden pier that's solid (clip it and you go down) but can be blown apart by cannon fire.
• Icebergs (some rounds) — only a small tip shows; the dangerous bulk underwater is far larger, so you strike them before they look close. A scrape costs ~40% of your health. They're destructible by gunfire or impact. Penguins waddle about on them.
• Clouds — drift across the battlefield, each a different random opacity; some are solid banks you can duck behind.

Multiplayer

Host a game, pick a player cap (2–16) and a mode, then share the auto-copied invite link. Players can even join mid-round. It's peer-to-peer over WebRTC — no server. The host can pause (P), change the rules mid-battle, and kick players. The scoreboard (Tab, or the ⚙ menu on mobile) ranks everyone by a career sink count that carries across rematches. Press Enter to chat.

Controls

On phones it's laid out like a game controller: steer at the bottom-left with STOP (and a submarine's submerge button) just above; your ship's attacks — fire, plus mines & depth charges on surface ships — in a row at the bottom-right. Top-right has a ⏸ pause (host / single-player) and a ⚙ menu for the scoreboard, chat and leaving the game. Choose ships and rematch by tapping.