re: origins, odyssey or black flag ?

Origins and Odyssey are the best playing AC games in the series. Black Flag is good, more traditional, but has a lot of boat combat. I'm not into that personally, but just pointing out it's a major focus in the game. I think Odyssey has a fair amount of boat combat as well.

Odyssey is really more of Origins but with a lot more content, some have said too much. I think Origins is the better game, but depends on if you want Egypt or Greece as a setting.