im not sure on the exact number, but it's one of the early Venice sequences.
No, there is not any cheats in assassins creed / assassins creed II / Assassins creed brotherhood --------------------------------- in brotherhood if you finish a sequence 100% and go back into a memory and go into options, therewill be a cheats menu.
Somewhere along the lines of the game, near Memory Sequence 10 or 11 (I think) you will receive a codex after an assassination. Take this to Leonardo and he will outfit you with the hidden pistol.
you go back into the animus and select the memory sequence that you want to re do but it only works in the first assassins creed and in brotherhood but I'm not sure about revelations
Nope, only in that one memory sequence.
you have to replay any memory form the sequence you got the cheat
you cant get a rifle in assassins creed revelations but you can get a hidden gun
Yes.
yes, in assassins creed two you are working with Ezio's memory to help Desmond become an assassin you also play as hm in the credit level and fight with a hidden blade this means the third one is going to be amazing.
Yes you just go to the pause menu and then go to DNA then you pick which sequence the memory you want to play was in and it will give you a list of missions from that sequence
The mission will end.
a bit shorter then 2, the second had 14 memory sequences plus some levels outside the animus, brotherhood had 9 and about the length of a memory sequence
No there are 12 sequences in AC3.