Which AC?
Which AC?
Played Black Flag from Revelations, AC3, and it was the most enjoyable experience I've had.
This depends on what you're looking for in the story. For Assassin's Creed 2 & Brotherhood, Revelations (Bomb system and hook blade) brought some updates. Assassin's Creed 3 offers a major shift—play feels better and the setting moved from Italy to America. Assassin's Creed Black Flag has an unclear story but the piracy is enjoyable; choose what suits you best.