Dreadfleet is a limited edition game from Games Workshop. This cooperative game is playable by at least two players and up to a maximum of 10 players. The game was released on 1 October 2011 and is set within the Warhammer Fantasy universe. One player takes command of the Grand Alliance, which is composed of the greatest pirate captains, whilst the other commands the Dread Fleet, a force of undead or demon-aligned captains and their skeleton crews.

Sartosa, the homeland of Captain Jaego Roth, is raided by the Dread fleet, killing his family and causing him to go on a quest to destroy Count Noctilus, the leader of Dread Fleet. After a failed attempt to recruit the Empire to his cause, he steals the ship The Heldenhammer from the Cult of Sigmar. Knowing that he needs to find more allies, he raids Zandri, the city ruled by undead king Amenhotep, and sails away with chests full of gold. This angers Amenhotep, who then joins the forces with Count Noctilus, creating the Dread Fleet. With their new funding, Roth recruits The Flaming Scimitar and The Swordfish. The three vessels head back to Sartosa to restock before heading to the Galleon's Graveyard, Noctilus's headquarters.

The trio encounters a sinking dwarfen vessel, and decide to aid the dwarfs. Heading to Barak Varr instead of Sartosa, they manage to recruit a steam-powered Dwarven battleship Grimnir's Thunder. The two forces cross the boundary but become scattered. The ships manage to regroup after fending off the Dreadfleet, and then encounter and recruit The Seadrake. The Grand Alliance heads to the Maelstrom, the source of Noctilus' power, where Roth sacrifices himself to destroy the Dreadfleet.

The Grand Alliance consists of five vessels:

• The Heldenhammer, captained by the leader of the Grand Alliance, Captain Jaego Roth. It fields 180 cannons and hosts the Grand Templus, a large temple blessed by holy powers. It also sports Sigmar's Wrath, a statue representing Sigmar wielding a steam powered hammer used to smash enemy vessels;

• The Swordfysh has the only female captain in the Grand Alliance, Aranessa Saltspite. Aranessa was born without normal legs, and with mermaid-like fluke instead. She later amputated her legs below the knees to get rid of the fluke, and replaced them with two jagged blades of sawfish;

• The Flaming Scimitar is powered by magics and The Golden Magus stands at its helm. He casts powerful magics upon his opponents instead of using traditional weaponry;

• Grimnir's Thunder is the Dwarven battleship piloted by Red Brokk Gunnarsson, a master engineer from the Dwarven seahold Barak Varr. Grimnir's Thunder can launch a dirigible from its decks;