Fifteen years after Corvo Attano restored Emily Kaldwin to the throne following the assassination of her mother, Dunwall has prospered under her reign. A serial killer known as "the Crown Killer" has been murdering Emily's enemies, leading many to believe that Emily and Corvo are responsible. During a ceremony in remembrance of Jessamine Kaldwin's assassination, Duke Luca Abele of Serkonos arrives with the witch Delilah Copperspoon. Delilah claims to be Jessamine's half-sister and the true heir to the throne. The Duke's men attack, killing Emily's men. The player then chooses whether to continue as Emily or Corvo, and the character not chosen is magically turned to stone by Delilah.
Both characters wield a pistol, crossbow, a retractable blade, grenades and mines—all of which are upgradable. Upgrades may be purchased at black market shops found throughout levels, and blueprints scattered throughout the environment unlock new upgrades. Coin is required to buy these upgrades, which can be found throughout levels or gained from other collectibles, like stealing paintings. Players can choose whether to play stealthily or not and can finish the game without taking a life. Health elixirs and food consumables will restore health, while mana elixirs replenish mana.
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