American musician Bear McCreary composed the game's soundtrack, replacing Austin Wintory, the composer used for the base game.

It has a standalone story campaign that is loosely connected to the base game's narrative, but largely retains its central mechanics.

Jack the Ripper is the first major post-launch DLC pack for Syndicate, and was released on various platforms in December 2015. Jack the Ripper's goal is to subvert the legacy of his estranged mentor Jacob Frye, while Evie attempts to find her missing brother and stop the Ripper's reign of terror as well as the criminals he has rallied to his cause. The pack follows two player characters who oppose each other: Evie Frye, a member of the Brotherhood of Assassins and one of the two protagonists of the base game, and a fictionalized version of the titular historical figure, depicted as a mentally disturbed renegade Assassin within series lore.

Set in London in 1888, Jack the Ripper explores the purported untold circumstances surrounding the brutal murders of several prostitutes who lived and worked in the East End of London between 31 August and 9 November 1888, and the true identity of their murderer. Assassin's Creed Syndicate: Jack the Ripper is a downloadable content (DLC) expansion pack developed and published by Ubisoft for the 2015 action-adventure video game Assassin's Creed Syndicate.

Assassin's creed identity gameplay