AC 1, Revelations and 2, possibly Black Flag are the ones I'd go for. AC1 is in my heart because I played it when I was basically a kiddo, on then released PS3. What a nostalgia. And AC2 made my history interest sealed forever. Revelations is a special story and the Black Flag is perfect because of ship battles and islands, pirate stuff. Overall, AC marked my youth and really influenced some of my views on history. Great reminder of this once a great series. :) upvoted!!