Apologies to all other esteemed members. Quoting 5 replies is stupid so I chose to answer yours.
judging by a number of vitriolic replies, people here think AC is indeed a RPG franchise.
Not sure why, as it is just an opinion.
If people think AC franchise is a RPG, who am I to tell them otherwise? Just another Joe Schmoe on the internet.
It all boils down to what is considered a RPG? My point is, how can you call a game RPG, if many of players don't care for story/mechanics, and just enjoy the visuals/world.
Your experience may differ, of course, but I, personally, own all of them AC games and haven't finished a single one. With Black Flag, for example, I spent most of the time sailing the ship around. And with Origins, exploring the environment.
Amazing "RPGs" with bland mechanics and uninteresting stories.