
Build your port. Command your fleet.
Rule the seas.
A naval strategy game set in the golden age of piracy. No download, just play in your browser.
No account needed. Start playing instantly.
168 captains sailing
18 captains at sea in the last hour. Every fight in Dunmast is recorded and anyone can watch it play out.
55x Cannon Battery
33x Heavy Cannon
22x War Sloop
22x Brigantine+41x Frigate, 1x Galleon, 1x Sea Wall, 1x Mortar Emplacementjust nowWatch
88x Frigate
88x Mortar Emplacement
66x Galleon
66x Brigantine+176x Heavy Cannon, 6x Cannon Battery, 2x Man-o'-War, 1x Sea Wall, 1x Watch Fires, 1x Coastal Fortress27m agoWatch
88x Frigate
88x Mortar Emplacement
66x Galleon
66x Brigantine+176x Heavy Cannon, 6x Cannon Battery, 2x Man-o'-War, 1x Sea Wall, 1x Watch Fires, 1x Coastal Fortress31m agoWatch
1212x Heavy Cannon
1212x Cannon Battery
88x Mortar Emplacement
33x Coastal Fortress+32x Hot Shot Furnace, 1x Sea Wall36m agoWatch
1414x Palisade
1010x Cannon Battery
88x Galleon
66x Heavy Argosy+114x Frigate, 4x Merchant Cog, 2x Heavy Cannon, 1x Sea Wall36m agoWatch
22x Bulwark/
55x Frigate
55x Mortar Emplacement
33x Coastal Fortress
22x Harbour Chain44m agoWatch
1414x Palisade
1010x Cannon Battery
88x Galleon
66x Heavy Argosy+114x Frigate, 4x Merchant Cog, 2x Heavy Cannon, 1x Sea Wall45m agoWatch

Construct shipyards, mines, distilleries, and watchtowers. Every building produces resources over time, even while you're away. Upgrade to unlock new capabilities and endgame materials.


Build warships from nimble sloops to devastating men-o'-war. Scout enemy ports, raid their resources, escort merchant convoys, or trade at distant markets. Every ship has a purpose.


Other players can raid your port while you sleep. Build shore batteries, harbour chains, and coastal fortresses. Form alliances with other captains. Gunpowder runs out mid-battle. Bring enough or retreat.

Complete quests for three rival factions. Find lost journal fragments, treasure map pieces, and ancient relics. Each relic grants a permanent bonus. Complete full sets to unlock titles and ship appearances.

Keepers of the old sea law. Exploration and cartography.

Master shipbuilders. Salvage and construction.

Raiders and privateers. Combat and subterfuge.

Browser game. No download. No app. Works on any device.
Your port grows while you're away.