Based on the browser game, Fallen London. The player takes on the role of an Unterzee steamship captain, whose background and ambitions are customisable. The player can "win" by achieving their chosen ambition, such as becoming Fallen London's most celebrated explorer or amassing enough wealth to retire. Resources to achieve these ends are acquired by discovering new locations, trading goods across the Unterzee, battling ships and "zee monsters", and completing "storylet" quests.(Wikipedia).