Whether it's a sequel from an annualized racing series or an expansion pack to a well-received game, there's comfort in the familiar--and, potentially, boredom as well. Dead Kings, the first downloadable content for Assassin's Creed Unity, is an unfortunate example of the perils of taking the beaten path and the design bugs that go with it. So it's a minor blessing that protagonist Arno Dorian returns without a thirst for vengeance or a love interest to protect, his two motivations from the main game. All he wants to do is leave late 18th century Paris...almost as much as I do.
It is from a "one last heist" premise that Dead Kings springs forth. Without the need for money or emotional attachments to complicate the situation, Arno comes into the job as a brooding ex-assassin who just wants to get away from all the dark memories of his time in the city. This is also why Dead Kings is set in the Parisian suburb of Saint-Denis rather than in Paris proper. Safe passage to Egypt is Arno's reward; all he has to do is find a manuscript and solve several tomb puzzles. One would think that a ticket from Paris to Egypt would be less complicated, but it wouldn't be much of a game if Arno just spent a day pickpocketing for boat fare, now would it?