Depend on what you mean. If you want to replay missions, then yes. If you were hoping on a freestyle mode, killing anyone you want, then no.
Yes, if u don't beat assassins creed 2 then you will be totally lost when you play assassins creed brotherhood. because it starts off exactly where it ended and you'll be sooo confused of who everyone is how this all started what happened I HIGHLY recommended you play assassins creed 2 before you play assassins creed brotherhood. :)))
you just keep playing it.
It took me 4 days
You watch it again or go play Assassins Creed 3 or if you havent Beaten the game beat it.
Complete "Beat Up" missions.
You need to 1of master assassins master missions...well beat all the assassins challeages then you will end up wit sword of altair
you could start a new file
use eagle vision to locate maria then follow her
you beat him, same as the 360 version.
Not that I know of, I haven't seen her on any maps. Why do you need to see her though?
just follow the path with the templars and go forward till you have to chase his target.
Through a system of trial and error, if you're skilled and determined, you could get through Assassin's Creed: Brotherhood without purchasing any armour upgrades.