IIRC, this game doesn't have 3 days free like Revelations. I believe you can play free for an unlimited time, but you can only get to like level 10 or 20 or something.
I think the passport is like $10, but there is a character you won't have, The Silent Shadow. Which isn't a huge deal. I don't care for him all that much myself, really. --- I found that highly offensive Official Aveline de Grandpre of the ACIII boards