Only if you wish to achieve 100% completion. It's not necessary if you're just playing the storyline. And no, you won't get anything out of getting them.
There are 420 flags you will need to collect for Assassins Creed (good luck finding them all)
You get a crossbow. You don't get the crossbow, the crossbow was taken totally out of the game after the initial trailers were already made.
if u collect them all you get money
collect them in all the cities.........ps----easy
you have to collect all the flags in Roma. Once you do that you exit the Animus and you will told that Ezio went to Spain. This then unlocks extra memory sequences that take place in Spain.
Nothing, An Achievement is all you recieve.
If you find all of the 101 Borgia flags and 10 feathers that have been scattered around Rome in Assassins Creed: Brotherhood, then the diabolically stylish (and Notoriety-eliminating) Borgia Cape will be yours. In the first game, you just get all the related achievements.
Ezio is awarded the Borgia Cape. It allows you to do the same thing as with the Auditore Cape. You gain no Notoriety, but are still pursued for breaking the law.
Assasins Creed: Collect the Flags in each City/Zone. Kill the Templars. Assasins Creed 2: Improve the Villa Collect the Fethers Purchase all Armor, Paintings, and Upgrades. Complete the Codex Collection You can also kill guards, and civilians, but not horses. Oh and you can also kill yourself :)
Assassin's Creed 3 hasn't come out yet, but in Assassin's creed Brotherhood you get the "In Memoriam" trophy or achievement.
The second Assassin's Creed is called Assassin's Creed II.
There are heaps They include Ezio The Jester The dentist and more but the main Brotherhood characters are Altair (From Assassins creed and Assassins creed Bloodlines) Ezio (Assassins creed 2 and Assassins creed Brotherhood) Devon a.k.a. Exio (Assassins creed Revelations) Conner (Assassins creed 3) And coming out soon Edward (Assassins creed IV: Black Flag) i hope this is useful if you want to impress people who don't know what Assassins Creed is (Wich is Impossible) so yeah