Assassin's Creed: Rogue Is the Series' Most Controversial Game (1752 - 1776 AD)

The series' second pirate-focused game, 2014's Rogue is set during the same time period as Assassin's Creed III. Its protagonist Shay Cormac, a former Assassin who joins the Templars, interacts with characters from multiple AC games, including 2015's Unity. This gives what could have been a loose spin-off surprisingly strong continuity.