In this 1-bit first-person mystery game, a merchant ship called the Obra Dinn has appeared at a London harbor, years after being declared lost at sea. As an insurance adjuster, the player must examine the ship for clues. "In 1802, the merchant ship "Obra Dinn" set out from London for the Orient with over 200 tons of trade goods. Six months later it hadn't met its rendezvous point at the Cape of Good Hope and was declared lost at sea. Early this morning of October 14th, 1807, the Obra Dinn drifted into port with sails damaged and no visible crew. As insurance adjustor for the East India Company's London Office, find means to board the ship and recover the Crew Muster Roll book for assessment."