There are also interesting side stories, such as how their choice of abc.xyz as a domain for the new company has dramatically... [more] (slaw.ca)
The co-op missions are also a healthy change for the series and provide some really interesting side stories, along with the single - player - driven Paris Story missions that add both color and context to the time period, as well as the Assassin - Templar war. (egmnow.com)
The majority of it is optional, but I found myself exploring every nook and cranny in the city and uncovering plenty of interesting side stories along the way. (snackbar-games.com)