User blog comment:Subject 16*/Assassin's Creed: Revelations - News/@comment-3967387-20110513175027/@comment-1655340-20110513182121

Sequence 12 and 13 are covered in the DLC for ACII. Bonfire for the Vanities(?), and the other one that I can't name. If you look at the AC Series navbox at the bottom of any AC page, there should be a link.