how many sequences are in assassin's creed 2

There are 14 sequences in Assassin's Creed 2 in total. At launch, the game featured 12 sequences, and the remaining 2 sequences were released later as DLC. These 14 sequences cover the entire story of Ezio Auditore, including the DLC story expansions. The DLC sequences are Sequence 12: Battle of Forli and Sequence 13: Bonfire of the Vanities, which add more context to the game's ending. In remastered versions and collections, all 14 sequences are included together.