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Copernicus Conspiracy is a free downloadable content (DLC) addition for Assassin's Creed: Brotherhood, originally released exclusively for the PlayStation 3. The DLC is included in the remastered version of Brotherhood as part of The Ezio Collection, and was also released for PC in May 2017.

Comprising eight memories, the DLC focuses on the famed astronomer Nicolaus Copernicus and the efforts of Ezio Auditore to protect him from the Templars, who do not want Copernicus to educate the public about astronomy.


In 1500, Nicolaus Copernicus shares his teachings with a crowd near the Palazzo Senatorio, in clear defiance against the Templars' wishes. As Ezio arrives, Borgia soldiers show up to kill Copernicus and prevent his teachings from spreading. Ezio protects Copernicus and dispatches the guards before escorting the astronomer to a small safehouse near the Colosseum.

Copernicus, wanting to warn the other scholars in Rome, gives Ezio letters to hand to them before they are assassinated by the guards. While it is too late for one of the scholars, who is killed by an arquebusier, Ezio is able to warn the others and they chose to flee Rome.

ACB Intelligentsia 2

Ezio delivering Copernicus' letter to a scholar

Returning to Copernicus, Ezio is informed of who is responsible for the purge: the Master of the Sacred Palace, a man appointed by the Pope to keep Rome's philosophy pure. Ezio proceeds to tail a cardinal to a meeting with the Master and overhears that the latter has dispatched his best guards to deal with the situation.

Ezio kills each of the five executioners before they can reach their intended targets, and reports back to Copernicus. Having decided he will not allow the threat looming over him to hinder his research, Copernicus reveals that he will be out in public that night to chronicle a lunar eclipse. To protect the astronomer, Ezio decides to eliminate the Master, but with his dying wrods, the latter reveals that he has already dispatched guards to kill Copernicus.

ACB Close the Book 7

Ezio and Copernicus observing the eclipse

Ezio rushes back to Copernicus and arrives in time to save his life once again, killing all the guards. Grateful for Ezio's assistance, Copernicus thanks him and explains his theory that the Sun is at the center of the universe rather than the Earth and his belief that humanity will one day reach space. The two then watch the eclipse together before going their separate ways.


  1. False Censorship
  2. Out of Orbit
  3. Intelligentsia
  4. Honorary Degree
  5. Expedited Post
  6. Man in Red
  7. Sitting Ducks
  8. Close the Book


Originally released exclusively for the PlayStation 3 version of Assassin's Creed: Brotherhood on the same day as the game, Copernicus Conspiracy was later made officially playable on PC through a patch, released on 23 May 2017 for Steam and UPlay. It was also included in The Ezio Collection, released for the PlayStation 4, Xbox One and Nintendo Switch.