From publisher blurb:
Unsinkable! is standalone, eldritch horror themed 5e adventure that gives you a whole boat to play around on. It has 3 decks of rooms and encounters that can serve as a one shot to slot into your campaign or a complete adventure in itself. For those of you who have backed Jailbreak! And Wanted! It serves as a conclusion to the saga. Can your players sink the boat before the unholy ritual is complete?
• Detailed ship lore and adventure text including a timeline of terror building to a deadly climax!
• Three decks of warship with descriptions of each room and what’s in it; including a table that lets you build your own rooms
• Emergent storytelling artifacts tell the story of the boat and give clues to the evil lurking in its dark heart
• Statblocks for the crew and eldritch creatures that lurk aboard ship; Zombie Captain, Freudian nightmares and the Dark Heart of the Ship!
• Unique 'tarot table' generates NPC characters that you get to sacrifice to the ship but you can also use to generate visions and nightmares for the players